Ring Size Chart Perth – Western Australian Ring Size Guide 2026

Ring Size Chart Perth

Australian ring sizes for Perth WA — AU/NZ letter sizes with US, UK, and EU conversions, a free size calculator, and expert fitting tips for Perth's hot Mediterranean climate and Indian Ocean lifestyle

🇦🇺 AU Size M–N Average 🇺🇸 US · 🇬🇧 UK · 🇪🇺 EU Conversions 📐 All 5 Fingers Covered 🌊 Indian Ocean / WA Beach Lifestyle Guide 💒 Engagement Ring Sizing

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M–N

Average AU Women's
Ring Size Perth WA

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+½ Size

Perth Summer Heat
Swelling Allowance

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16.71mm

Average Ring
Finger Diameter

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Most Common
Engagement Size AU

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What Is the Average Ring Size in Perth, WA?

The most common ring size for women in Perth and across Western Australia is AU size M to N (US 6¼–6¾, EU 52.5–53.8, diameter 16.71–17.12 mm) — matching the national Australian average. Perth is Australia's sunniest capital city with a Mediterranean climate, experiencing long, hot, dry summers where temperatures frequently exceed 38°C and occasionally reach 45°C, particularly during the easterly "Fremantle Doctor" heat events before the afternoon sea breeze arrives. Perth's summer heat is the primary ring-sizing consideration for WA residents — outdoor measurements or readings taken before the sea breeze arrives can read up to half an AU letter larger than your true indoor air-conditioned neutral size. Perth's mild winters (8–19°C) are not a significant sizing factor. Always measure indoors in air conditioning in the evening for the most reliable year-round result. Perth shoppers can visit Chatoyer Diamonds (Perth's own diamond specialist), Tiffany & Co at Raine Square or Garden City, Michael Hill at Carousel, Karrinyup, Whitford City, or Garden City, Shiels at several Perth locations, and Prouds at major Perth centres — or order online from Angara AU, Moi Moi, and Shiels with Perth metro delivery.

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Best Ring Size by Finger — Perth AU

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Thumb

AU P–T

US: 7¾–9¾

The widest finger. In Perth's hot WA summers — particularly on scorching 40°C+ days before the Fremantle Doctor sea breeze arrives — thumb rings measured outdoors can read a full AU letter larger than your true indoor A/C size. Always measure indoors after cooling down for 20–30 minutes, and size up by at least one AU letter from base measurement for comfortable year-round knuckle clearance.

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Index Finger

AU N–P

US: 6¾–7¾

Typically half an AU letter larger than the ring finger. Perth's long summer season (November–March) means outdoor heat swelling is a sizing risk for extended periods of the year. For any ring ordered online to a Perth address, always use an indoor air-conditioned evening measurement taken after the day's heat has fully passed for a reliable, neutral result on this finger.

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Middle Finger

AU N–P

US: 6¾–7¾

Similar width to the index finger. Confirm sizing on the exact finger the ring will be worn on. For Perth residents ordering from Chatoyer Diamonds, Angara AU, or international retailers, take three indoor evening measurements across different days in autumn or spring and use the median AU letter — Perth's extended summer makes multi-day median sizing especially valuable for expensive custom or engagement rings.

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Ring Finger

AU L–N

US: 5¾–6¾

The most commonly sized finger — average AU M (US 6¼, 52.5 mm). Most Perth engagement and wedding rings are worn on the left ring finger. For in-store fitting at Chatoyer Diamonds in Perth CBD, Tiffany Raine Square, or Michael Hill Karrinyup, visit on a mild autumn or spring afternoon for the most neutral and representative year-round result. Avoid fitting appointments on Perth's hottest summer days.

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Pinky Finger

AU H–J

US: 4–4¾

The smallest finger. Perth has excellent jewellery retail across the metro area — Chatoyer Diamonds (CBD), Tiffany & Co (Raine Square and Garden City), Michael Hill (Carousel, Karrinyup, Whitford City, Joondalup, Cannington), and Prouds (multiple Perth centres) all stock a range of AU letter sizes and offer professional gauge fitting at no charge. For petite sizes below AU H, confirm in-store availability before visiting.

💡 Dominant hand fingers are typically ½ AU letter larger

💡 Perth summer heat — always measure indoors in A/C

💡 Measure the exact finger and hand the ring will be worn on

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Perth Ring Size Calculator

Enter your finger measurement to find your Australian ring size

Your Australian Ring Size

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Australian Ring Size Chart — Full Reference

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Perth Popular Size Range: AU J to P / US 4¾ to 7¾

The highlighted rows represent the most commonly purchased ring sizes in Perth and across Western Australia. AU sizes M and N are the most popular, with AU M being the single most stocked size at all Perth jewellers from Chatoyer Diamonds to Tiffany Raine Square to Michael Hill Karrinyup. Because Perth's hot Mediterranean summers can push finger measurements up by half an AU letter on very hot days — especially before the Fremantle Doctor afternoon sea breeze — always confirm your ring size using an indoor air-conditioned evening measurement before ordering. Data sourced from Chatoyer Diamonds Perth, Shiels, and Angara AU ring size standards.

🇦🇺 AU / NZ	🇺🇸 US Size	🇬🇧 UK Size	🇪🇺 EU Size	Diameter (mm)	Circumference (mm)	Fit Range
F	3	F	44	14.07 mm	44.20 mm	Petite
F½	3¼	F½	44.75	14.27 mm	44.80 mm	Petite
G	3½	G	45.5	14.48 mm	45.50 mm	Petite
G½	3¾	G½	46	14.68 mm	46.10 mm	Petite
H	4	H	46.75	14.88 mm	46.80 mm	Small
H½	4¼	H½	47.5	15.09 mm	47.40 mm	Small
I	4½	I	48	15.29 mm	48.00 mm	Small
J ⭐	4¾	J	48.75	15.49 mm	48.70 mm	Popular 🇦🇺
J½	5	J½	49.25	15.70 mm	49.30 mm	Popular 🇦🇺
K	5¼	K	50	15.90 mm	50.00 mm	Popular 🇦🇺
K½	5½	K½	50.5	16.10 mm	50.60 mm	Popular 🇦🇺
L	5¾	L	51.25	16.31 mm	51.20 mm	Popular 🇦🇺
L½	6	L½	51.75	16.51 mm	51.90 mm	Popular 🇦🇺
M 🏆	6¼	M	52.5	16.71 mm	52.50 mm	Most Common 🇦🇺
M½	6½	M½	53.25	16.92 mm	53.10 mm	Most Common 🇦🇺
N 🏆	6¾	N	53.75	17.12 mm	53.80 mm	Most Common 🇦🇺
N½	7	N½	54.5	17.32 mm	54.40 mm	Popular 🇦🇺
O ⭐	7¼	O	55	17.52 mm	55.10 mm	Popular 🇦🇺
O½	7½	O½	55.75	17.73 mm	55.70 mm	Popular 🇦🇺
P ⭐	7¾	P	56.25	17.93 mm	56.30 mm	Popular 🇦🇺
P½	8	P½	57	18.40 mm	57.00 mm	Above Avg
Q	8¼	Q	57.5	18.34 mm	57.60 mm	Above Avg
Q½	8½	Q½	58.25	18.54 mm	58.30 mm	Large
R	8¾	R	59	18.75 mm	58.90 mm	Large
R½	9	R½	59.5	18.95 mm	59.50 mm	Large
S	9¼	S	60.25	19.15 mm	60.20 mm	Large
S½	9½	S½	60.75	19.35 mm	60.80 mm	Large
T	9¾	T	61.5	19.56 mm	61.40 mm	XL
T½	10	T½	62	19.76 mm	62.10 mm	XL
U	10¼	U	62.75	19.96 mm	62.70 mm	XL
U½	10½	U½	63.25	20.17 mm	63.40 mm	XL
V	10¾	V	64	20.37 mm	64.00 mm	XXL
V½	11	V½	64.75	20.57 mm	64.60 mm	XXL
W	11¼	W	65.25	20.78 mm	65.30 mm	XXL
W½	11½	W½	66	20.98 mm	65.90 mm	XXL
X	11¾	X	66.5	21.18 mm	66.60 mm	XXL
X½	12	X½	67.25	21.39 mm	67.20 mm	XXL
Y	12¼	Y	67.75	21.59 mm	67.80 mm	XXL
Z	12½	Z	68.5	22.00 mm	68.50 mm	XXL
Z+1	13	Z+1	70	22.33 mm	70.15 mm	XXL+
Z+2	13½	Z+2	71	22.60 mm	71.00 mm	XXL+

🏆 AU Size M = Most purchased women's ring size in Perth & WA

⭐ AU J–P = Perth popular range

🟡 Highlighted = Perth popular range

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Average Ring Size by Country — Perth WA Comparison

Country / Region	Average Size	AU Equivalent	Diameter (mm)	Circumference
🇦🇺 Australia (Perth WA)	AU M–N	M–N	16.71–17.12 mm	52.50–53.80 mm
🇬🇧 United Kingdom	UK L–M	L–M	16.31–16.71 mm	51.20–52.50 mm
🇺🇸 USA & Canada	US 6–6½	L½–M½	16.51–16.92 mm	51.90–53.10 mm
🇳🇿 New Zealand	NZ M–N	M–N	16.71–17.12 mm	52.50–53.80 mm
🇪🇺 Continental Europe	EU 52–54	M–N	16.71–17.12 mm	52.50–53.80 mm
🇯🇵 Japan	JP 10–11	K–L	15.90–16.31 mm	50.00–51.20 mm
🌏 Asia (General)	AU F–M	F–M	14.07–16.71 mm	44.20–52.50 mm

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Factors That Affect Ring Size in Perth

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Perth's Scorching Summers

Perth is Australia's sunniest capital city with one of the hottest metropolitan climates on the continent. Summer temperatures regularly exceed 38°C and can reach 44–45°C during extreme heat events. Unlike coastal cities that cool quickly at night, Perth retains heat through the evening on hot days — making evening measurements during summer heatwaves less reliable than usual. On extreme summer days, fingers can swell by up to half an AU letter above indoor neutral size. Always measure indoors in air conditioning and wait a full 30 minutes after being outdoors before measuring.

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The Fremantle Doctor

Perth's famous afternoon sea breeze — the "Fremantle Doctor" — arrives most summer afternoons between 12 pm and 3 pm, dropping temperatures by 5–12°C within an hour. This rapid cool change means finger size can shift noticeably within a single afternoon. A measurement taken in the morning before the Fremantle Doctor will read slightly swelled from overnight heat retention; a measurement taken after it arrives will read closer to your neutral size. For the most accurate Perth summer reading, measure indoors in A/C in the early evening after the sea breeze has fully cooled the air.

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Beach & Outdoor Lifestyle

Perth residents enjoy one of Australia's most outdoor-oriented lifestyles, with easy access to Cottesloe, Scarborough, City Beach, and hundreds of Indian Ocean beaches. Extended outdoor time in the sun — swimming, surfing, beach cricket, and outdoor dining — causes hands to swell from both heat exposure and physical activity. Always allow a full 30-minute cool-down in air conditioning after any beach or outdoor activity before measuring ring size. Beach lifestyle measurements are consistently one of the least reliable at-home methods for Perth residents.

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Perth's Mild Winters

Perth winters (June–August) are mild and Mediterranean — typically 8–19°C with cool nights and pleasant sunny days. Unlike Melbourne or Launceston, significant cold contraction is not a ring-sizing concern in Perth in winter. A cool indoor winter morning measurement in Perth is very reliable and close to your true neutral size. If you must measure in summer, aim for the same temperature conditions — an air-conditioned room at approximately the same 18–20°C as a pleasant Perth winter day — for a consistent year-round result.

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Pregnancy & Hormones

Fluid retention during pregnancy increases ring circumference by 1–2 AU letters. In Perth's hot summers, hormonal swelling combined with summer heat can push finger size up by 2 or more AU letters above your true neutral indoor size. Never size a ring during summer pregnancy using an outdoor measurement. Use a ring adjuster throughout pregnancy and plan for a post-pregnancy resize. Perth jewellers including Chatoyer Diamonds and Michael Hill Karrinyup offer professional ring-sizing consultations at no charge for post-pregnancy resize planning.

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Band Width

Wide bands (over 6 mm) press against a wider section of the finger and feel tighter than slim bands at the same inner diameter. Order half an AU letter larger for any wide-band ring — especially men's wedding bands and full eternity-style women's rings. In Perth's hot summer climate, a wide-band ring sized exactly to your neutral indoor measurement can feel uncomfortably snug on very hot days or after outdoor beach activity. Sizing up by half an AU letter provides year-round comfort in all Perth conditions.

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How to Measure Ring Size at Home — Perth

Method 1 — Paper Strip (Most Recommended)

Cut a thin strip of paper or use thread

Cut a strip of paper about 1 cm wide and 10 cm long. Non-stretch thread, dental floss, or a thin fabric ribbon works equally well. This is the most accessible at-home method for Perth residents ordering online — no specialist equipment required, and the paper strip captures your exact finger circumference at the base of the finger and at the knuckle.

Cool down indoors in A/C first — critical in Perth summers

Perth's long, hot summer season makes pre-measurement indoor cool-down essential from November through to late March. Spend at least 20–30 minutes in a comfortably air-conditioned room (18–22°C) before measuring. Do not measure within 30 minutes of returning from the beach, a sunny outdoor event, or any prolonged outdoor time during summer. In Perth's mild winter and spring months, 10–15 minutes of indoor rest is sufficient.

Wrap snugly around the left ring finger

Wrap the strip around the base of the finger where the ring will sit. Also check that the strip passes comfortably over your knuckle — the ring must slide over it without force. Always measure the left ring finger on the left hand directly for engagement or wedding ring sizing, not an equivalent finger on the right hand or from a different finger on the same hand.

Mark the overlap and measure in mm

Mark where the strip meets itself and measure the length in millimetres on a flat ruler. Enter this circumference value into the Perth ring size calculator above for an instant AU letter result with US, UK, and EU conversions. Chatoyer Diamonds' ring size chart — based in Perth — uses the same AU letter standard as all major Australian jewellers.

Take 3 measurements across different days — use the median

Perth's extended summer heat season means a single measurement is less reliable than in cooler Australian capitals. Take readings on three different evenings across one week — ideally two in autumn/spring and one in mild winter — and use the median AU letter for any important ring purchase. This multi-day median approach is especially important for expensive engagement rings, wide-band styles, and any ring not easily resizable.

Method 2 — Existing Ring (Most Reliable for Online Orders)

Choose a well-fitting ring from the correct finger and hand

Select a ring worn comfortably on the specific finger and hand the new ring will be worn on. This method completely bypasses Perth's summer heat variable — a ring that fits well does so regardless of the temperature. It is the most reliable single-step method for Perth residents ordering from Chatoyer Diamonds, Angara AU, Shiels, or any international retailer.

Measure the inner diameter with a ruler or digital calipers

Lay the ring flat on a ruler and measure across the inside in mm. Take two readings at right angles and average them. Digital calipers (available at Perth hardware stores and Bunnings locations across Perth metro) give the most precise reading at 0.01 mm accuracy. Even a standard school ruler gives accuracy within one AU half-letter for most sizes.

Match to the Diameter column in the chart above

Find your measured diameter in the chart's Diameter (mm) column and read across for your AU, US, UK, and EU sizes — or enter the value into the calculator above under "Diameter (mm)" for an instant full conversion result ready to use with any Perth or international online jeweller.

📐 Key Formulas

Diameter → Circumference

Circumference (mm) = Diameter (mm) × π (3.14159)

Example: 16.71 mm × 3.14159 = 52.50 mm → AU Size M / US 6¼

Circumference → Diameter

Diameter (mm) = Circumference (mm) ÷ π (3.14159)

Example: 53.80 mm ÷ 3.14159 = 17.12 mm → AU Size N / US 6¾

Inches → Millimetres

mm = inches × 25.4

Example: 0.658″ × 25.4 = 16.71 mm → AU Size M / US 6¼

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Expert Ring Sizing Tips for Perth Shoppers

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Never measure during Perth's summer heat events or after outdoor time. Perth has Australia's hottest capital city climate and its longest summer sunshine season. Any outdoor measurement between October and April — or any measurement taken within 30 minutes of being outside in heat above 30°C — will likely over-read your true neutral size by up to half an AU letter. The safest Perth measurement conditions are a cool evening in April–May or September–October, indoors in air conditioning, after spending the full day inside.
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Use the Fremantle Doctor as your timing cue in summer. Perth's famous afternoon sea breeze arrives most summer days between 12 pm and 3 pm, dropping temperatures significantly. If you must measure in summer, wait until at least 2–3 hours after the Fremantle Doctor has arrived and you have been indoors in A/C for 30 minutes. This gives finger temperature time to stabilise to a more neutral indoor reading closer to your true year-round size than a morning or pre-sea-breeze measurement would provide.
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Account for Indian Ocean beach lifestyle swelling. Perth's beach and outdoor lifestyle is world-class, but extended outdoor beach time in the sun means hands are consistently larger than their indoor neutral size. For a ring that will be worn during outdoor or beach activities, size up by half an AU letter from your indoor neutral measurement. For a ring worn only indoors or in professional settings, your indoor air-conditioned measurement is the right reference size.
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Autumn and spring are the best Perth measurement seasons. March–May and September–November offer Perth's most comfortable and representative conditions — typically 18–26°C, dry, and pleasant. An indoor evening measurement during these seasons gives the most balanced year-round fit for Perth's climate, reflecting neither the swelled summer state nor any minimal cool-morning contraction. For engagement ring shoppers, a late April or early October measurement is ideal before the onset of summer or winter.
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Visit a Perth jeweller in-store for the most accurate professional fitting. Perth has excellent jewellery retail options for in-person AU sizing: Chatoyer Diamonds (Perth CBD — Perth's own specialist diamond jeweller), Tiffany & Co at Raine Square CBD and Garden City Shopping Centre Booragoon, Michael Hill at Carousel Cannington, Karrinyup, Whitford City Hillarys, Joondalup, and Cockburn Central, Shiels at multiple Perth metro centres, and Prouds at Westfield centres across Perth. Visit on a mild autumn or spring afternoon for the most neutral and accurate in-store result — avoid visiting on Perth's hottest summer days.
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Confirm resize policies before ordering complex styles. Plain solitaire rings and plain metal bands are typically resizable 1–2 AU letters at Chatoyer Diamonds Perth, Michael Hill Karrinyup, and major online retailers (Shiels, Angara AU). Full eternity bands, channel-set rings, pavé-set designs, and tension-set rings are very difficult or impossible to resize — always confirm your exact AU size using the existing ring measurement method before ordering these styles to any Perth metro address. Chatoyer Diamonds Perth specifically recommends using its ring size guide and visiting for a consult before ordering custom diamond designs.
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Surprise ring for a Perth partner? Default to AU size M. AU size M (52.50 mm circumference, 16.71 mm diameter, US 6¼) is the most universally stocked and purchased women's ring size at all major Australian jewellers — including Chatoyer Diamonds Perth, Tiffany Raine Square, Michael Hill Karrinyup, and Shiels. For a surprise purchase, AU M is the safest default to any Perth metro delivery address. Always pair it with a free first resize offer — available at Michael Hill, Shiels, and Angara AU — to eliminate all risk from an unconfirmed size. If possible, borrow a well-fitting ring from the left ring finger and measure its inner diameter in mm for a more accurate starting point than any default size assumption.

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Frequently Asked Questions

What is the average ring size for women in Perth WA? ▾

The average ring size for women in Perth is AU size M to N (US 6¼–6¾, EU 52.5–53.8, diameter 16.71–17.12 mm) — matching the national Australian average when measured indoors at a neutral room temperature. AU size M (US 6¼, circumference 52.50 mm) is the single most commonly purchased women's ring size at all major Perth jewellers including Chatoyer Diamonds, Tiffany Raine Square, Michael Hill Karrinyup, and Shiels. Because Perth's hot Mediterranean summers cause heat swelling, always use an indoor air-conditioned evening measurement rather than an outdoor or post-beach reading to confirm your true year-round neutral size.

How does Perth's climate and the Fremantle Doctor affect ring sizing? ▾

Perth is Australia's sunniest capital city with a hot Mediterranean climate. Summer temperatures regularly exceed 38°C, causing finger swelling of up to half an AU letter above neutral indoor size on very hot days. The Fremantle Doctor — Perth's famous afternoon sea breeze — arrives most summer afternoons between 12 pm and 3 pm, dropping temperatures by 5–12°C within an hour. This means finger size can shift noticeably within a single Perth summer afternoon. The solution: always measure indoors in air conditioning at a stable 18–22°C, wait at least 30 minutes after any outdoor time, and ideally take your Perth ring size measurement in the early evening after the Fremantle Doctor has cooled the day and you have been fully indoors for at least 30 minutes.

Where can I get professionally sized for a ring in Perth? ▾

Perth has excellent jewellery retail options for professional AU ring sizing. Chatoyer Diamonds is Perth's own specialist diamond and engagement ring jeweller (Perth CBD) and recommends an in-store consult for custom and engagement ring sizing. Tiffany & Co has Perth locations at Raine Square (CBD) and Garden City Shopping Centre Booragoon, both offering professional AU gauge sizing. Michael Hill has Perth metro stores at Carousel Cannington, Karrinyup Shopping Centre, Whitford City Hillarys, Joondalup, Cockburn Central, and more. Shiels and Prouds also have multiple Perth metro locations at Westfield and other centres. For online orders with Perth metro delivery, Chatoyer Diamonds, Shiels, Michael Hill online, and Angara AU all ship to Perth with tracked delivery.

Is Australian ring sizing the same as UK and NZ sizing? ▾

Yes — Australian, UK, and New Zealand ring sizes use exactly the same letter-based system (F through Z+) with identical inner diameter and circumference measurements at every letter size. AU size M equals UK size M and NZ size M precisely — all three share the same 16.71 mm inner diameter and 52.50 mm circumference. Perth residents can order from UK or NZ jewellers using their AU letter size directly with no conversion needed. A UK printable ring sizer or UK gauge set ordered online is fully compatible with AU sizing for at-home measurement in Perth.

How do I convert my AU ring size to US for international shopping? ▾

When is the best time of year to measure ring size in Perth? ▾

The best times to measure ring size in Perth are autumn (March–May) and spring (September–November), when temperatures are moderate — typically 18–26°C — and most representative of comfortable everyday conditions. These seasons avoid both Perth's extreme summer swelling and any minor cool-morning contraction in the mild winter months. If measuring during summer, do so indoors in air conditioning in the evening — at least 30 minutes after the Fremantle Doctor has cooled the day and you have been fully inside. Perth winter measurements are generally reliable indoors as mild WA winters produce minimal cold contraction compared to cooler Australian cities like Melbourne or Launceston.

What ring size should I buy as a surprise gift for a Perth partner? ▾

For a surprise women's ring for a Perth partner, default to AU size M — the national Australian average and the most universally stocked size at all Perth jewellers including Chatoyer Diamonds, Tiffany Raine Square, Michael Hill Karrinyup, and Shiels. All major online retailers (Shiels, Michael Hill, Angara AU) offer free first resizes on plain bands delivered to Perth metro. If possible, borrow a ring worn comfortably on the left ring finger and measure its inner diameter in mm — this temperature-independent method gives the most accurate AU letter for any surprise purchase regardless of Perth's seasonal temperature conditions at the time of purchase.

Does Chatoyer Diamonds offer ring sizing in Perth? ▾

Yes — Chatoyer Diamonds is a Perth-based diamond and engagement ring specialist that provides a comprehensive ring size guide and chart specifically referencing Perth customers. Chatoyer Diamonds recommends purchasing a ring sizer tool if you are unsure of your size at home, or visiting their Perth showroom for a comprehensive diamond and design consultation that includes professional AU ring gauge sizing. Their ring size chart uses inner diameter in millimetres as the primary measurement and covers AU sizes F through Z with US and EU conversions — fully compatible with the chart and calculator on this page. For Perth residents ordering custom engagement rings from Chatoyer Diamonds, an in-store visit for a professional AU gauge fitting is strongly recommended before finalising any bespoke ring design.