Promise Ring Size Chart Australia – AU Size Guide, Calculator & Tips

Promise Ring Size Chart Australia

Complete AU promise ring size guide — which finger to wear it on, average sizes for women and men, full AU/US/EU chart, instant calculator, measuring tips and expert advice

💍 Which Finger Guide ♀ Women AU N / US 7 ♂ Men AU T / US 10 🧮 Instant Calculator 🇦🇺 AU · 🇺🇸 US · 🇪🇺 EU 💡 Secret Sizing Tips

♀

AU N

Average Women's
Promise Ring Size

♂

AU T

Average Men's
Promise Ring Size

💍

Right

Most Common Hand
for Promise Rings

📏

2–4mm

Most Common Promise
Ring Band Width

A promise ring uses exactly the same AU letter sizing scale as any other ring — engagement rings, wedding bands, fashion rings. There is no separate "promise ring size." What matters is which finger you plan to wear it on, since each finger is a different size. Most Australian women wear promise rings on the right-hand ring finger (AU N, US 7) and most men on the right-hand ring finger (AU T, US 10). Promise rings are typically narrow bands (2–4mm) so no size adjustment is needed for band width.

💍

Which Finger Does a Promise Ring Go On?

💜 There is no single "correct" finger for a promise ring — it is a personal choice. However, in Australia, the most common convention is the right-hand ring finger. This avoids confusion with engagement rings (worn on the left-hand ring finger) while still carrying symbolic meaning. Some people also wear promise rings on the left-hand ring finger before an engagement, moving it to the right hand when they become engaged.

💍

Right Ring Finger

AU N / US 7 (♀)
AU T / US 10 (♂)

✅ Most Common in AU

The most popular choice for promise rings in Australia. Avoids confusion with engagement rings worn on the left.

🖐️

Left Ring Finger

AU N / US 7 (♀)
AU T / US 10 (♂)

♀ Pre-Engagement

Worn here before engagement, then moved to right hand when an engagement ring is received. Same size as right hand.

☝️

Right Index Finger

AU Q / US 8.5 (♀)
AU V / US 11 (♂)

Fashion Choice

Some people wear promise rings here as a fashion or friendship ring statement. Typically 2 sizes larger than ring finger.

🤙

Pinkie Finger

AU J / US 5 (♀)
AU P / US 8 (♂)

Friendship Rings

Pinkie promise rings and friendship rings are often worn here. Typically 3–4 sizes smaller than the ring finger.

⚠️ Always measure the specific finger the promise ring will be worn on. The right-hand ring finger and left-hand ring finger are often slightly different sizes — the dominant hand is typically 0.5–1 size larger. If your partner plans to move the ring between hands later, measure both and order the larger size so it can be worn on either hand or resized later.

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Average Promise Ring Sizes — Women & Men Australia

♀ Women's Promise Ring Sizes

Most common size: AU N (US 7)
Right ring finger average: AU N / AU N½
Circumference: 53.8 – 54.4 mm
Inner diameter: 17.1 – 17.3 mm
EU size equivalent: 53.8 – 54.4
Typical range: AU K½ to AU Q (US 5.5–8.5)
Petite women: AU H½ – AU K (US 4.25–5.25)
Band width: usually 2–3mm for promise rings
No size adjustment needed for narrow bands
Best gift guess: AU N (most common AU women's)

♂ Men's Promise Ring Sizes

Most common size: AU T (US 10)
Right ring finger average: AU T / AU T½
Circumference: 62.2 – 62.9 mm
Inner diameter: 19.6 – 19.8 mm
EU size equivalent: 62.2 – 62.9
Typical range: AU Q to AU W (US 8.5–11.5)
Smaller men: AU N – AU Q (US 7–8.5)
Band width: usually 3–5mm for promise rings
Size up ½ for bands wider than 5mm
Best gift guess: AU T (most common AU men's)

✅ Buying a secret promise ring? Use AU N (US 7) for women or AU T (US 10) for men as a starting point. Most Australian jewellers including Michael Hill, Shiels, and Wallace Bishop offer at least one complimentary resize within 30–60 days of purchase — always confirm their resize policy before buying.

🧮

Promise Ring Size Calculator — Australia

Enter any measurement to instantly find your AU promise ring size

Your AU Promise Ring Size

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Full Promise Ring Size Chart — AU, US, EU

All sizes below use the standard Australian / UK / NZ letter system sourced from Shiels, Class A Jewellers, Statement Collective, and Wallace Bishop Australia. Promise rings use the same sizing scale as all other rings — simply find the size for the finger you plan to wear it on.

🇦🇺 AU / UK	🇺🇸 US	🇪🇺 EU / ISO	Diameter (mm)	Circumference (mm)	Typical Wearer	Promise Ring Use
F	3	44.2	14.07 mm	44.2 mm	♀ Child / Petite	Children / pinkie
G	3.5	45.5	14.48 mm	45.5 mm	♀ Petite	Petite women
H	4	46.8	14.88 mm	46.8 mm	♀ Small	Small women
H½	4.25	47.4	15.09 mm	47.4 mm	♀ Small	Small women
I	4.5	48.0	15.29 mm	48.0 mm	♀ Small	Small women
J	4.75	48.7	15.49 mm	48.7 mm	♀ Small	Small women / teen pinkie
J½	5	49.3	15.70 mm	49.3 mm	♀ Small	Small women
K	5.25	50.0	15.90 mm	50.0 mm	♀ Small–Med	Common women's
K½	5.5	50.6	16.10 mm	50.6 mm	♀ Small–Med	Common women's
L	5.75	51.2	16.31 mm	51.2 mm	♀ Medium	Popular women's
L½	6	51.9	16.51 mm	51.9 mm	♀ Medium	Popular women's
M	6.25	52.5	16.71 mm	52.5 mm	♀ Medium	Very popular women's
M½	6.5	53.1	16.92 mm	53.1 mm	♀ Medium	Very popular women's
N ⭐	6.75	53.8	17.12 mm	53.8 mm	♀ Most Common	Most popular ♀ size ⭐
N½ ⭐	7	54.4	17.32 mm	54.4 mm	♀ Most Common	Most popular ♀ size ⭐
O	7.25	55.1	17.52 mm	55.1 mm	♀ Medium	Popular women's
O½	7.5	55.4	17.73 mm	55.4 mm	♀ Medium	Popular women's
P	7.75	56.3	17.93 mm	56.3 mm	♀ Med–Large	Popular women's
P½	8	57.0	18.14 mm	57.0 mm	↔ Overlap	Large ♀ / small ♂
Q	8.25	57.6	18.34 mm	57.6 mm	↔ Overlap	Large ♀ / small ♂
Q½	8.5	58.3	18.54 mm	58.3 mm	♂ Small–Med	Common men's
R	8.75	58.9	18.75 mm	58.9 mm	♂ Small–Med	Common men's
R½	9	59.5	18.95 mm	59.5 mm	♂ Medium	Common men's
S	9.25	60.2	19.15 mm	60.2 mm	♂ Medium	Popular men's
S½	9.5	60.8	19.35 mm	60.8 mm	♂ Medium	Popular men's
T ⭐	9.75	61.4	19.56 mm	61.4 mm	♂ Most Common	Most popular ♂ size ⭐
T½ ⭐	10	62.1	19.76 mm	62.1 mm	♂ Most Common	Most popular ♂ size ⭐
U	10.25	62.7	19.96 mm	62.7 mm	♂ Med–Large	Common men's
V	10.75	64.0	20.37 mm	64.0 mm	♂ Large	Large men's
W	11.25	65.3	20.78 mm	65.3 mm	♂ Large	Large men's
X	11.75	66.6	21.18 mm	66.6 mm	♂ XL	XL men's
Z	12.5	68.5	21.79 mm	68.5 mm	♂ XL	XL men's

⭐ AU N / N½ = Most common ♀ promise ring size in Australia

⭐ AU T / T½ = Most common ♂ promise ring size in Australia

↔ AU P½–Q = Overlap zone (unisex)

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How to Measure for a Promise Ring at Home

Decide which finger the promise ring will be worn on
Most Australian promise rings go on the right-hand ring finger. Make sure to measure that specific finger — not a different finger or the other hand. Each finger is a different size.

Cut a thin strip of paper, 3mm wide and 10cm long
Printer paper or card stock works well. Do not use fabric, string, or stretchy materials — they compress and give a smaller reading than the actual finger size.

Wrap snugly around the finger base — check it passes the knuckle
The paper loop should fit snugly at the base but also slide over the knuckle. If the knuckle is noticeably wider, use the knuckle measurement so the ring can actually be put on and taken off.

Mark the overlap and measure in mm
Mark where the paper crosses itself. Lay it flat on a ruler and measure from one end to the mark in millimetres. This is your inner circumference in mm = your EU ring size. Match this number to the Circumference column in the chart above.

Measure 3 times (morning, midday, afternoon) and average
Fingers vary in size throughout the day. Take three readings, add them up and divide by three. If the result falls between two AU sizes, always choose the larger one for comfort. Wallace Bishop Australia recommends measuring at a normal room temperature — not when your hands are cold or immediately after exercise.

Quick Conversion Formulas

Circumference (mm) → Diameter

Diameter (mm) = Circumference ÷ π (3.14159)

Example: 53.8 mm ÷ 3.14159 = 17.12 mm → AU Size N (women's most common promise ring size)

EU Size shortcut

EU size = your circumference measurement in mm directly

Example: You measure 54mm → EU 54 → AU Size N. No calculation needed — your paper strip measurement in mm is your EU size.

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Expert Tips — Promise Ring Sizing in Australia

🤫Measuring secretly for a surprise promise ring — the most reliable secret method is to borrow a ring your partner already wears on the correct finger and have it measured by a jeweller with a ring mandrel (free at most AU jewellers). Alternatively, trace the inside of the ring on paper and measure the inner diameter with a ruler — match to the Diameter column of the chart above.
💍Promise rings are usually narrow — no size adjustment needed — unlike men's wide wedding bands (4–8mm), most promise rings are 2–4mm wide and can be ordered at your exact measured size. Wallace Bishop Australia specifically notes that their size chart applies to rings up to 3mm in width — for 3–6mm add half a size. Promise rings wider than 5mm should be sized up by half a size.
🔄Plan for finger migration if the ring might change hands — many people initially wear a promise ring on the left-hand ring finger and move it to the right when they get engaged. If this is the plan, measure both ring fingers and order the larger size (usually the dominant right hand is 0.5–1 size larger) so the ring can be worn on either hand comfortably.
🏪Get professionally sized at any major AU jeweller for free — Michael Hill, Shiels, Angus & Coote, Wallace Bishop, and Moi Moi all offer free professional ring sizing using precision mandrel tools. For any ring over $150 AUD, it's worth the 2-minute visit to confirm your size before ordering online.
📦Always check the resize and return policy — most Australian jewellers offer at least one complimentary resize within 30–60 days. However, rings with stones set all the way around (eternity-style promise rings) or made of titanium or tungsten generally cannot be resized — confirm this with the jeweller before purchasing any promise ring in these materials or styles.
🌡️Measure at the right time and temperature — measure in the afternoon at room temperature for the most accurate reading. Cold fingers (such as early morning in Australian winter) can be up to 2 sizes smaller than warm afternoon fingers. Moi Moi Australia and Class A Jewellers both recommend avoiding measurement when hands are cold, swollen from exercise, or immediately after a long flight.
💑Matching couple promise rings — measure independently — couple promise ring sets come in matching styles but different sizes. Never assume your partner's ring size based on your own. Measure both fingers independently and order the correct size for each person. Most AU jewellers supply couple sets where each ring is ordered to individual sizes.

✅

Do's & Don'ts — Promise Ring Sizing

✅ DO

Measure the specific finger the ring will be worn on
Measure at room temperature in the afternoon
Measure 3 times and use the average
Round up when between two sizes
Check the ring passes over the knuckle
Confirm the resize policy before purchasing
Use the right-hand ring finger (most common for promise rings)
Get professionally sized at a AU jeweller (free)
For couples rings, measure each person individually
Consider if the ring may switch hands later

✗ DON'T

Assume all fingers are the same size
Measure when hands are cold or just after exercise
Use string or stretchy material to measure
Guess based on clothing size (no correlation)
Buy titanium or tungsten if unsure of size — can't be resized
Order an eternity-style promise ring without an exact size
Use the other hand's measurement if wearing on right hand
Forget to check if left and right ring fingers differ in size
Order without checking the jeweller's resize policy
Measure once and assume it's accurate

❓

Frequently Asked Questions

What size is a promise ring in Australia? ▾

There is no separate "promise ring size" — promise rings use the same standard AU letter sizing as all rings. For most Australian women the most common promise ring size is AU N (US 7, EU 53.8) and for most Australian men it is AU T (US 9.75, EU 61.4). These are averages only — always measure the actual finger the ring will be worn on, as individual variation is significant.

Which finger does a promise ring go on in Australia? ▾

In Australia, the most common convention is to wear a promise ring on the right-hand ring finger. This avoids any confusion with an engagement ring, which is traditionally worn on the left-hand ring finger. However, there is no rule — some people wear promise rings on the left-hand ring finger (and move it when they get engaged), on the right index finger, or on the pinkie. Choose whichever finger feels right and measure that specific finger.

Is a promise ring size the same as an engagement ring size? ▾

Yes — the AU size scale is identical for promise rings, engagement rings, wedding bands, and all other ring types. However, if a promise ring is worn on the right-hand ring finger and an engagement ring will later be worn on the left-hand ring finger, the two rings may be different sizes — these are different fingers. Always measure each finger separately for each ring.

What is AU ring size N in US and EU sizing? ▾

AU size N is equivalent to US 6.75, EU 53.8, with an inner diameter of 17.12 mm and circumference of 53.8 mm. AU N½ is equivalent to US 7, EU 54.4, diameter 17.32 mm. Both AU N and AU N½ are considered the women's average Australian ring size and are the most commonly ordered sizes for women's promise rings across Shiels, Michael Hill, and other major AU jewellers.

Do I need to size up for a promise ring? ▾

For most promise rings — which are typically narrow bands of 2–4mm — no size adjustment is needed. Order your exact measured size. Wallace Bishop Australia notes that size adjustments only apply for bands wider than 3mm: add half a size for 3–6mm wide bands, and a full size for bands wider than 6mm. Virtually all women's and most men's promise rings fall in the 2–4mm range where no adjustment is required.

Can promise rings be resized in Australia? ▾

Most plain metal promise rings in gold, silver, rose gold, or platinum can be resized by 1–2 sizes by an Australian jeweller for approximately $50–$150 AUD. However, promise rings made from titanium or tungsten cannot be resized at all — get the size exactly right before ordering. Promise rings with stones set continuously around the entire band (full-eternity style) also generally cannot be resized — confirm with the jeweller before purchasing.

What is the average promise ring size for a teenage girl in Australia? ▾

There is no separate "teenage" size standard, but teenage girls typically wear smaller sizes than adult women. Most teenage girls (ages 13–18) fall in the AU J to AU M range (US 4.75–6.25), with an inner circumference of approximately 48–53 mm. Younger teens and pre-teens may fall in AU F–I (US 3–4.5). Always measure rather than guessing — individual variation in teenage years is especially large due to growth and development.

How do I secretly measure my girlfriend's ring size for a surprise promise ring? ▾

The most reliable methods are: (1) Borrow a ring she already wears on her right-hand ring finger and take it to a jeweller to be measured on a mandrel (free, takes 2 minutes). (2) Trace method — place the ring on paper, trace the inside circle, measure the diameter, and match to the Diameter column above. (3) Paper slip — while she's asleep, gently wrap a thin paper strip around her ring finger, mark the overlap, and measure. If none of these are possible, order AU N (US 7) — the most common Australian women's size — and confirm the jeweller's free resize policy before purchasing.

Is AU ring size the same as UK ring size? ▾

Yes — Australian, UK, New Zealand, and Irish ring sizes all use the same letter system and are identical in measurement. AU N = UK N = NZ N. This means you can use any UK ring size chart for Australian sizing. The Shiels, Class A Jewellers, and Statement Collective AU size charts are directly equivalent to UK charts. This also means promise rings ordered from UK-based online stores will use the same AU letter sizes.