Ring Measure – Complete Ring Size Guide

Ring Measure

Complete Australian Ring Size Guide

The complete ring size guide — sizes A to Z+3, diameter in mm, circumference, and international conversions for US, UK, EU & Japan

🇦🇺 Australian / UK Standard 📏 Sizes A – Z+3 📐 mm Measurements 🔄 US · EU · Japan · India 🏠 Measure at Home

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Avg Women's
Australian Size

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Avg Men's
Australian Size

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Total Sizes
in Chart

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Go Up 1 Size
if Between Sizes

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Ring Size Calculator

Enter your finger measurement to instantly find your Australian ring size

Your Australian Ring Size

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Complete Australian Ring Size Chart

AU / UK Size	Diameter (mm)	Diameter (in)	Circumference (mm)	Circumference (in)	Typical Wearer
A	12.0 mm	0.472″	37.8 mm	1.49″	Child
B	12.3 mm	0.484″	38.5 mm	1.52″	Child
C	12.5 mm	0.492″	39.3 mm	1.55″	Child
D	12.8 mm	0.504″	40.0 mm	1.57″	Child
E	13.0 mm	0.512″	40.8 mm	1.61″	Child
F	13.2 mm	0.520″	41.5 mm	1.63″	Child
G	13.5 mm	0.531″	42.3 mm	1.66″	Small Women
H	13.7 mm	0.539″	43.0 mm	1.69″	Small Women
I	13.9 mm	0.547″	43.8 mm	1.72″	Women
J	14.2 mm	0.559″	44.5 mm	1.75″	Women
K	14.4 mm	0.567″	45.3 mm	1.78″	Women
L	14.6 mm	0.575″	46.0 mm	1.81″	Women
M	14.9 mm	0.587″	46.8 mm	1.84″	Popular ♀
N ⭐	15.1 mm	0.594″	47.5 mm	1.87″	Most Common ♀
O	15.3 mm	0.602″	48.3 mm	1.90″	Popular ♀
P	15.6 mm	0.614″	49.0 mm	1.93″	Women / Men
Q	15.8 mm	0.622″	49.8 mm	1.96″	Women / Men
R	16.1 mm	0.634″	50.5 mm	1.99″	Men
S	16.3 mm	0.642″	51.3 mm	2.02″	Men
T ⭐	16.6 mm	0.654″	52.0 mm	2.05″	Most Common ♂
U	16.8 mm	0.661″	52.8 mm	2.08″	Popular ♂
V	17.0 mm	0.669″	53.5 mm	2.11″	Men
W	17.3 mm	0.681″	54.3 mm	2.14″	Men
X	17.5 mm	0.689″	55.0 mm	2.17″	Large Men
Y	17.8 mm	0.701″	55.8 mm	2.20″	Large Men
Z	18.0 mm	0.709″	56.5 mm	2.22″	Large Men
Z+1	18.2 mm	0.717″	57.3 mm	2.26″	XL
Z+2	18.5 mm	0.728″	58.0 mm	2.28″	XL
Z+3	18.7 mm	0.736″	58.8 mm	2.31″	XL

⭐ Size N = Most common women's size in Australia

⭐ Size T = Most common men's size in Australia

📐 Highlighted rows = most popular

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Visual Ring Size Scale

Proportional circles representing the relative diameter of each Australian ring size. Compare side by side to understand scale differences.

⚠️ Proportional only — not exact pixel-to-mm. Always use a ruler for accurate sizing.

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Popular Size Visual Comparison

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How to Measure Your Ring Size at Home

Method 1 — Paper / String (Most Accurate)

Cut a thin strip of paper

About 1 cm wide and 10 cm long. A piece of string or thread also works perfectly.

Wrap around your finger

Wrap snugly around the base of the finger, ensuring it passes comfortably over the knuckle.

Mark the overlap point

Use a pen to mark exactly where the strip meets — this length equals your finger circumference.

Measure in millimetres

Lay the strip flat on a ruler. Record the length in mm, then enter it in the calculator above.

Match to the chart

Find the closest value in the Circumference (mm) column of the Australian ring size chart above.

Method 2 — Measure an Existing Ring

Choose a ring that fits well

Select a ring that comfortably fits the finger you want to size.

Measure the inner diameter

Use a ruler to measure straight across the inside opening of the ring in millimetres.

Match to the chart above

Find that measurement in the Diameter (mm) column to get your Australian ring size.

📐 Conversion Formulas

Diameter → Circumference

Circumference (mm) = Diameter (mm) × 3.14159

Example: 15.1 mm × 3.14159 = 47.4 mm → Australian Size N

Inches → Millimetres

mm = inches × 25.4

Example: 0.594″ × 25.4 = 15.1 mm → Australian Size N

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International Ring Size Conversion

🇦🇺 Australia / UK	🇺🇸 US / Canada	🇪🇺 EU / ISO	🇯🇵 Japan	🇮🇳 India	Diameter (mm)	Circ. (mm)
A	0.5	38	1	—	12.0 mm	37.8 mm
D	2	40	3	—	12.8 mm	40.0 mm
F	3	41	5	1	13.2 mm	41.5 mm
H	4	43	7	3	13.7 mm	43.0 mm
J	4.75	44	8	5	14.2 mm	44.5 mm
L	5.5	46	10	8	14.6 mm	46.0 mm
M	6	46.5	11	9	14.9 mm	46.8 mm
N	6.5	47	12	10	15.1 mm	47.5 mm
O	7	48	13	11	15.3 mm	48.3 mm
P	7.5	49	14	12	15.6 mm	49.0 mm
Q	8	49.5	15	13	15.8 mm	49.8 mm
R	8.5	50	15	14	16.1 mm	50.5 mm
S	9	51	16	15	16.3 mm	51.3 mm
T	9.5	52	17	16	16.6 mm	52.0 mm
U	10	52.5	18	17	16.8 mm	52.8 mm
V	10.5	53	19	18	17.0 mm	53.5 mm
W	11	54	20	19	17.3 mm	54.3 mm
X	11.5	55	21	20	17.5 mm	55.0 mm
Y	12	55.5	22	21	17.8 mm	55.8 mm
Z	12.5	56	23	22	18.0 mm	56.5 mm
Z+2	13.5	58	25	24	18.5 mm	58.0 mm

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Australian Ring Size by Finger

Typical Australian Ring Size Ranges by Finger

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AU Size V – Z+3 · Always needs a comfort-fit band

Index / Pointer Finger

AU Size N – T · Often 1 size larger than ring finger

Middle Finger

AU Size O – U · Largest finger on most hands

Ring Finger 💍

AU Size K – Q · Most popular for engagement & wedding rings

Pinky Finger

AU Size G – M · Great for stacking & signet rings

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Index Finger

AU Size N – T
Often 1 size larger than ring finger

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Middle Finger

AU Size O – U
Typically the largest finger

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Ring Finger

AU Size K – Q
Most popular for jewellery

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Pinky Finger

AU Size G – M
Great for stacking rings

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AU Size V – Z+3
Always needs comfort-fit

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Children

AU Size A – H
Always measure — varies widely

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Quick Size Reference

Who	AU Size Range	Diameter Range	Safe Default
👧 Children (3–12 yrs)	A – H	12.0 – 13.7 mm	Size E
👩 Teen Girls	H – L	13.7 – 14.6 mm	Size J
👩 Australian Women (avg)	L – Q	14.6 – 15.8 mm	Size N
👨 Australian Men (avg)	R – W	16.1 – 17.3 mm	Size T
💪 Large-Framed Men	X – Z+3	17.5 – 18.7 mm	Size Z

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Ring Sizing at Top Australian Jewellers

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Michael Hill

Australia's largest jeweller — free in-store ring sizing nationwide

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Prouds the Jewellers

AU/UK standard sizing with complimentary in-store fitting service

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Bevilles

Free printable ring sizer guide plus in-store sizing available

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Cerrone Jewellers

Custom AU sizing with free resizing within 30 days of purchase

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Zamels

Full AU letter sizes — free ring-sizing in all stores

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Hardy Brothers

Premium AU/UK sizing with complimentary resizing policy

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Expert Ring Sizing Tips for Australians

🌅Measure in the evening — fingers naturally swell throughout the day, especially after physical activity.
☀️Australia's hot summers matter — fingers swell in heat. Measure in warm conditions for year-round comfort in QLD, WA and NT.
🏖️Avoid measuring after swimming — cold and salt water temporarily shrink fingers, giving an inaccurately small reading.
📐Between two sizes? Always choose the larger size for day-to-day comfort.
🔁Measure both hands — the dominant hand is often half to one full size larger.
💎Wide bands fit tighter — for bands 5 mm or wider, order one Australian letter size larger than your measurement.
🎁Buying as a surprise? AU Size N for women and Size T for men are the safest blind-buy choices.
📏Measure 3 times and average the results for the most accurate reading before ordering online.
🔧Free resizing available — Michael Hill, Prouds, and Bevilles all offer free ring resizing within 30 days of purchase.

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All Pages & Guides

Browse our complete library of ring size guides, charts, conversions and city-specific resources across Australia.

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Frequently Asked Questions

What is the most common ring size for women in Australia?▼

The most common ring size for Australian women is Size N (circumference ~47.5 mm, diameter ~15.1 mm), equivalent to US size 6.5. Sizes M, N, and O together cover the majority of Australian women.

What is the most common ring size for men in Australia?▼

Australian men most commonly wear Size T (circumference ~52.0 mm, diameter ~16.6 mm), equivalent to US size 9.5. Sizes S, T, and U account for the majority of men's purchases.

Are Australian ring sizes the same as UK sizes?▼

Yes — Australia uses the exact same alphabetical letter system as the UK. A ring labelled "Size N" in a UK jeweller is the same fit as "Size N" in Australia.

How do I convert Australian ring size to US size?▼

AU Size N = US 6.5 and AU Size T = US 9.5. Use the full international conversion table above for a complete AU to US, EU, Japan and India mapping.

Can I measure my ring size accurately at home?▼

Yes. Wrap a strip of paper around your finger, mark the overlap, and measure in mm. Enter it into the calculator above. Measuring 3 times and averaging gives the best result.

Does ring band width affect the size I need?▼

Yes. Bands wider than 5 mm fit tighter. Order one Australian letter size larger than your measured size for a comfortable fit.

Can gold and platinum rings be resized in Australia?▼

Yes. Gold and silver rings can typically be resized 1–2 sizes. Platinum is harder to resize due to its density and may cost extra. Always confirm with your jeweller.

What size should I buy as a surprise engagement ring?▼

Go with AU Size N for most Australian women. If she has larger or smaller hands, adjust one size up or down. Most jewellers will resize free of charge after the proposal.

Ring Size Calculator

Enter your finger measurement to instantly find your Australian ring size

Complete Australian Ring Size Chart

Visual Ring Size Scale

Popular Size Visual Comparison

How to Measure Your Ring Size at Home

Method 1 — Paper / String (Most Accurate)

Cut a thin strip of paper

Wrap around your finger

Mark the overlap point

Measure in millimetres

Match to the chart

Method 2 — Measure an Existing Ring

Choose a ring that fits well

Measure the inner diameter

Match to the chart above

📐 Conversion Formulas

International Ring Size Conversion

Australian Ring Size by Finger

Typical Australian Ring Size Ranges by Finger

Thumb

Index / Pointer Finger

Middle Finger

Ring Finger 💍

Pinky Finger

Index Finger

Middle Finger

Ring Finger

Pinky Finger

Thumb

Children

Quick Size Reference

Ring Sizing at Top Australian Jewellers

Michael Hill

Prouds the Jewellers

Bevilles

Cerrone Jewellers

Zamels

Hardy Brothers

Expert Ring Sizing Tips for Australians

All Pages & Guides

How To Measure

Ring Size Charts

Ring Size Conversions

Ring Size Tips & Guides

Men & Women Guides

Australian City Guides

More City Guides

Regional City Guides

Small Towns & Regions

Frequently Asked Questions