Complete Ring Size Chart Guide Australia – AU Sizes A to Z+3

Complete Ring Size Chart Guide Australia

The ultimate Australian ring sizing reference — sizes A to Z+3, diameter & circumference in mm, international conversions, how to measure at home, and expert tips

🇦🇺 Australian / UK System 📏 Sizes A – Z+3 📐 mm & Inch Measurements 🔄 US · EU · Japan · India 🏠 Measure at Home 💍 All Fingers Covered

💍

Avg Women's
Australian Size

💍

Avg Men's
Australian Size

📊

Total Sizes
A to Z+3

📐

Go Up 1 Size
if Between Sizes

🧮

Australian Ring Size Calculator

Enter your finger measurement to instantly find your Australian ring size

Your Australian Ring Size

—

📊

Complete Australian Ring Size Chart

ℹ️

About Australian Ring Sizes

Australia uses the same alphabetical ring sizing system as the United Kingdom (Wheatsheaf system), running from size A (smallest) to Z+3 (largest). Each letter step increases the diameter by approximately 0.4 mm. Half sizes (e.g. N½) are also available from many jewellers.

🇦🇺 AU / UK	Diameter (mm)	Diameter (in)	Circumference (mm)	Circumference (in)	🇺🇸 US Size	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″	1	Child
D	12.8 mm	0.504″	40.0 mm	1.57″	2	Child
E	13.0 mm	0.512″	40.8 mm	1.61″	2½	Child
F	13.2 mm	0.520″	41.5 mm	1.63″	3	Child
G	13.5 mm	0.531″	42.3 mm	1.66″	3½	Small Women
H	13.7 mm	0.539″	43.0 mm	1.69″	3¾	Small Women
I	13.9 mm	0.547″	43.8 mm	1.72″	4¼	Women
J	14.2 mm	0.559″	44.5 mm	1.75″	4¾	Women
K	14.4 mm	0.567″	45.3 mm	1.78″	5¼	Women
L	14.6 mm	0.575″	46.0 mm	1.81″	5¾	Women
M	14.9 mm	0.587″	46.8 mm	1.84″	6¼	Popular ♀
N ⭐	15.1 mm	0.594″	47.5 mm	1.87″	6¾	Most Common ♀
O	15.3 mm	0.602″	48.3 mm	1.90″	7¼	Popular ♀
P	15.6 mm	0.614″	49.0 mm	1.93″	7¾	Women / Men
Q	15.8 mm	0.622″	49.8 mm	1.96″	8¼	Women / Men
R	16.1 mm	0.634″	50.5 mm	1.99″	8¾	Men
S	16.3 mm	0.642″	51.3 mm	2.02″	9¼	Men
T ⭐	16.6 mm	0.654″	52.0 mm	2.05″	9¾	Most Common ♂
U	16.8 mm	0.661″	52.8 mm	2.08″	10¼	Popular ♂
V	17.0 mm	0.669″	53.5 mm	2.11″	10¾	Men
W	17.3 mm	0.681″	54.3 mm	2.14″	11¼	Men
X	17.5 mm	0.689″	55.0 mm	2.17″	11¾	Large Men
Y	17.8 mm	0.701″	55.8 mm	2.20″	12¼	Large Men
Z	18.0 mm	0.709″	56.5 mm	2.22″	12¾	Large Men
Z+1	18.2 mm	0.717″	57.3 mm	2.26″	13	XL
Z+2	18.5 mm	0.728″	58.0 mm	2.28″	13½	XL
Z+3	18.7 mm	0.736″	58.8 mm	2.31″	14¼	XL

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

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

📐 Highlighted rows = most popular sizes

🔡 Each size step ≈ 0.4 mm diameter increase

🔄

International Ring Size Conversion Chart

🇦🇺 AU / UK	🇺🇸 US / Canada	🇪🇺 EU / ISO	🇯🇵 Japan	🇮🇳 India	Diameter (mm)	Circ. (mm)
A	—	38	1	—	12.0 mm	37.8 mm
D	2	41.5	4	—	12.8 mm	40.0 mm
F	3	44	6	1	13.2 mm	41.5 mm
H	3¾	46	7	3	13.7 mm	43.0 mm
J	4¾	48	9	5	14.2 mm	44.5 mm
L	5¾	51	11	8	14.6 mm	46.0 mm
M	6¼	52.5	12	9	14.9 mm	46.8 mm
N ⭐	6¾	54	14	11	15.1 mm	47.5 mm
O	7¼	55	15	12	15.3 mm	48.3 mm
P	7¾	56	16	13	15.6 mm	49.0 mm
Q	8¼	57.5	17	14	15.8 mm	49.8 mm
R	8¾	59	18	15	16.1 mm	50.5 mm
S	9¼	60	19	16	16.3 mm	51.3 mm
T ⭐	9¾	62	21	17	16.6 mm	52.0 mm
U	10¼	63	22	18	16.8 mm	52.8 mm
V	10¾	64	23	19	17.0 mm	53.5 mm
W	11¼	65	24	20	17.3 mm	54.3 mm
X	11¾	66.5	26	22	17.5 mm	55.0 mm
Z	12¾	69	29	24	18.0 mm	56.5 mm
Z+1	13	70	30	25	18.2 mm	57.3 mm
Z+3	14¼	73.5	33	28	18.7 mm	58.8 mm

🇦🇺 AU = 🇬🇧 UK = 🇳🇿 NZ — all use the same letter system

🇪🇺 EU size = internal circumference in mm

🇺🇸 US sizes use a numerical half-step scale

👁️

Visual Ring Size Scale

Proportional circles representing the relative internal diameter of each Australian ring size — from A (smallest) to Z+3 (largest).

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

📐

Popular Size Visual Comparison

🤚

Australian Ring Size by Finger

Finger	AU / UK Range	🇺🇸 US Range	Avg Diameter	Notes
👍 Thumb	O – V	7¼ – 10¾	17.0–18.5 mm	Widest finger; size up for comfort
☝️ Index	L – Q	5¾ – 8¼	15.5–17.0 mm	Often ½ size larger than ring finger
🖕 Middle	M – Q	6¼ – 8¼	15.8–17.3 mm	Usually same as or slightly larger than index
💍 Ring (Left)	J – P	4¾ – 7¾	14.5–16.5 mm	Most commonly sized; engagement & wedding rings
💍 Ring (Right)	K – Q	5¼ – 8¼	15.0–17.0 mm	Typically ½ size larger than left ring finger
🤙 Pinky	E – K	2½ – 5¼	12.5–15.0 mm	Smallest finger; petite rings

💡 Always measure the specific finger you plan to wear the ring on

💡 Dominant hand fingers are ~½ size larger than non-dominant

📏

How to Measure Your Ring Size at Home

Method 1 — Paper Strip or String (Most Accurate)

Cut a thin strip of paper

About 1 cm wide and 10 cm long. Non-stretchy string or dental floss also work well.

Wrap snugly around your finger

Wrap the paper around the base of the finger you want to size. Ensure it slides comfortably over your knuckle.

Mark the overlap point

Use a pen to mark exactly where the strip overlaps. This length equals your finger's circumference.

Measure in millimetres

Lay the strip flat against a ruler and record the length in mm. Enter this into the calculator above.

Find your AU size

Look up your circumference in the Circumference (mm) column of the Complete Australian Ring Size Chart above.

Method 2 — Existing Ring

Choose a well-fitting ring

Select a ring that fits comfortably on the target finger — not too tight, not too loose.

Measure the inner diameter

Place the ring flat on a ruler and measure straight across the inside opening in millimetres.

Look up in the Diameter column

Find the matching value in the Diameter (mm) column in the chart above to identify your Australian size.

Method 3 — Ruler / Calliper (Most Precise)

Use a digital calliper

A digital calliper (available from hardware stores) gives the most precise diameter measurement of both your finger and existing rings.

Measure finger diameter

Press the calliper gently across the widest part of your finger (just below the knuckle) and read the measurement in mm.

Match to Diameter column

Find this measurement in the Diameter (mm) column of the full chart to get your exact Australian ring size.

📐 Measurement Conversion Formulas

Diameter → Circumference

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

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

Circumference → Diameter

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

Example: 52.0 mm ÷ 3.14159 = 16.55 mm → Australian Size T

Inches → Millimetres

mm = inches × 25.4

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

💡

Expert Australian Ring Sizing Tips

🌡️
Measure at normal temperature. Fingers shrink in cold weather and swell in heat. Always measure at comfortable room temperature for the most reliable result.
🌙
Measure at the end of the day. Fingers are naturally slightly larger in the evening after daily activity. This ensures your ring will be comfortable throughout the entire day.
📏
Measure 2–3 times and average. Ring finger dimensions can vary slightly between measurements. Take multiple readings and use the average value for the most accurate result.
⬆️
Round up if between sizes. If your circumference falls between two letter sizes, always choose the larger size. A slightly loose ring is far safer — and resizable — compared to one that is too tight.
💍
Wide bands fit tighter. If choosing a wide band (6mm or more), go up half a size from your measured AU size. Wider bands have more surface contact and feel noticeably tighter on the finger.
✋
Always measure the correct finger and hand. Ring sizes differ between fingers and between your dominant and non-dominant hand. The same finger on your dominant hand is typically half a size larger.
🏥
Avoid measuring when unwell or swollen. Illness, medication, pregnancy, and high salt intake can all temporarily increase finger size. Measure when you are feeling your normal self for best accuracy.
🔄
Most rings can be resized. Plain gold, silver, and platinum bands can typically be resized 1–2 sizes up or down. Rings with stones all around (eternity bands) are difficult to resize — always get these sized precisely before ordering.

🏪

Australian Jewellers — Ring Sizing Services

💎

Michael Hill

One of Australia's largest jewellers. Free in-store ring sizing at all AU locations.

💍

Shiels Jewellers

Australian jeweller with a detailed online AU ring size chart and free printable sizing guide.

🏆

Wallace Bishop

Queensland-based jeweller with comprehensive ring size guides and in-store sizing tools.

⭐

Hardy Brothers

Premium Australian jeweller offering professional in-store ring sizing using certified mandrels.

🌟

Angara AU

Online jeweller with a detailed Australian ring size guide with downloadable printable chart.

✨

Moi Moi

Australian fine jeweller with a full AU ring size reference chart and home-measurement instructions.

❓

Frequently Asked Questions

What ring size system does Australia use? ▾

Australia uses the UK Wheatsheaf alphabetical ring sizing system. Sizes run from A (the smallest, diameter 12.0 mm) through to Z+3 (the largest, diameter 18.7 mm). Each letter step equals approximately 0.4 mm of diameter. This is the same system used in New Zealand, the United Kingdom, Ireland, and South Africa.

What is the most common ring size for Australian women? ▾

The most common ring size for Australian women is size N, which corresponds to a diameter of 15.1 mm and a circumference of 47.5 mm. This equates to approximately US size 6¾ and EU size 54. Women's sizes in Australia generally range from J to P, with M, N, and O being the most frequently purchased.

What is the most common ring size for Australian men? ▾

The most common ring size for Australian men is size T, which has a diameter of 16.6 mm and a circumference of 52.0 mm. This equates to US size 9¾ and EU size 62. Men's sizes in Australia typically fall between R and W, with T and U being the most purchased.

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

Australian (UK letter) sizes convert to US numerical sizes as follows: AU N = US 6¾, AU T = US 9¾, AU L = US 5¾, AU P = US 7¾. The US system uses incremental half-sizes rather than letters. Use the International Conversion Chart above for a full size-by-size reference across all sizes.

How do I convert Australian ring size to European (EU) size? ▾

EU ring sizes correspond to the ring's internal circumference in millimetres. For example, AU size N has a circumference of 47.5 mm, making it EU size 47–48. AU size T has a circumference of 52.0 mm, making it EU size 52. Use the Circumference (mm) column in the chart and round to the nearest EU number.

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

Yes — Australian ring sizes are identical to UK ring sizes. Both use the same Wheatsheaf alphabetical system from A to Z+3. An AU size N is exactly the same as a UK size N. Australian and New Zealand ring sizes are also identical to each other, as all three countries use the same sizing standard.

What if my knuckle is larger than my finger base? ▾

This is a common issue. You need the ring to pass over your knuckle, so measure your knuckle circumference and use that as your size guide. If the difference between knuckle and finger base is large, ask your jeweller about a hinged shank or sizing beads, which allow rings to fit the knuckle when putting on and grip the base when worn.

Can Australian ring sizes be half sizes? ▾

Yes — half sizes exist in the Australian/UK system (e.g. N½, P½, T½). Many jewellers offer half sizes, especially in the popular women's range (L½ to P½). Half sizes add approximately 0.2 mm to the diameter and are ideal when your measurement falls exactly between two full letter sizes.

How accurate is measuring with a paper strip at home? ▾

The paper strip method is accurate to within ±0.5 mm when done correctly. This precision is usually sufficient for ordering rings in standard sizes. For expensive or bespoke jewellery, we recommend visiting an Australian jeweller in person to be measured with a professional ring mandrel or calliper for the most precise result.