Finger Ring Size Chart UK – Complete Guide 2026

Finger Ring Size Chart UK – Complete 2026 Guide

The complete UK finger ring size chart — every size A to Z+6, diameter in mm, circumference, men's & women's ranges, and international conversions for US, EU, India & Japan

🇬🇧 UK Sizes A – Z+6 📐 Diameter & Circumference 👩 Women's Sizes F – P 👨 Men's Sizes P – Z+6 🔄 US · EU · India · Japan ✅ 2026 Updated

A–Z+6

📊 Full UK Finger
Ring Size Range

👩 Most Common
Women's Size

👨 Most Common
Men's Size

📏 Half Sizes
Available Throughout

ℹ️

UK Finger Ring Size Chart – Overview 2026

The UK finger ring size chart runs from A (diameter 11.9 mm) to Z+6 (diameter 23.9 mm) covering every finger on every hand. Women's sizes typically fall between F and P and men's between P and Z+2. Half sizes are available throughout the full range. The UK system uses alphabetical letters — completely different from the numeric US system. Always measure in millimetres for the most accurate finger ring size, then cross-reference with this chart.

🧮 UK Finger Ring Size Calculator 2026

Enter your finger measurement to instantly find your UK finger ring size

Your UK Finger Ring Size

—

📊 Complete UK Finger Ring Size Chart A – Z+6 (2026)

UK Size	Diameter (mm)	Diameter (in)	Circ. (mm)	Circ. (in)	Gender / Use
A	11.9 mm	0.469″	37.4 mm	1.47″	Child / Midi
A½	12.0 mm	0.472″	37.6 mm	1.48″	Child / Midi
B	12.1 mm	0.476″	38.1 mm	1.50″	Child
B½	12.3 mm	0.484″	38.6 mm	1.52″	Child
C	12.5 mm	0.492″	39.1 mm	1.54″	Child / Teen
C½	12.6 mm	0.496″	39.6 mm	1.56″	Child / Teen
D	12.8 mm	0.504″	40.2 mm	1.58″	Teen
D½	13.0 mm	0.512″	40.8 mm	1.61″	Teen
E	13.2 mm	0.520″	41.5 mm	1.63″	Women's Petite
E½	13.4 mm	0.528″	42.0 mm	1.65″	Women's Petite
F	13.5 mm	0.531″	42.6 mm	1.68″	Women's
F½	13.7 mm	0.539″	43.1 mm	1.70″	Women's
G	13.9 mm	0.547″	43.6 mm	1.72″	Women's
G½	14.1 mm	0.555″	44.2 mm	1.74″	Women's
H	14.2 mm	0.559″	44.8 mm	1.76″	Women's
H½	14.4 mm	0.567″	45.3 mm	1.78″	Women's
I	14.5 mm	0.571″	45.7 mm	1.80″	Women's
I½	14.7 mm	0.579″	46.3 mm	1.82″	Women's
J	14.9 mm	0.587″	46.8 mm	1.84″	Engagement
J½	15.1 mm	0.594″	47.4 mm	1.87″	Engagement
K	15.2 mm	0.598″	47.8 mm	1.88″	Engagement
K½	15.4 mm	0.606″	48.4 mm	1.91″	Engagement
L	15.5 mm	0.610″	48.7 mm	1.92″	Women's Popular
L½	15.7 mm	0.618″	49.3 mm	1.94″	Women's Popular
M ⭐	15.9 mm	0.626″	49.9 mm	1.96″	Most Common Women's
M½	16.1 mm	0.634″	50.5 mm	1.99″	Women's Popular
N ⭐	16.2 mm	0.638″	50.9 mm	2.00″	Women's Popular
N½	16.4 mm	0.646″	51.5 mm	2.03″	Women's
O	16.5 mm	0.650″	51.9 mm	2.04″	Women's
O½	16.7 mm	0.657″	52.5 mm	2.07″	Women's
P	16.9 mm	0.665″	53.0 mm	2.09″	Unisex
P½	17.1 mm	0.673″	53.6 mm	2.11″	Unisex
Q	17.2 mm	0.677″	54.1 mm	2.13″	Men's
Q½	17.4 mm	0.685″	54.7 mm	2.15″	Men's
R	17.5 mm	0.689″	55.1 mm	2.17″	Men's
R½	17.7 mm	0.697″	55.7 mm	2.19″	Men's
S	17.8 mm	0.701″	56.0 mm	2.20″	Men's
S½	18.0 mm	0.709″	56.5 mm	2.22″	Men's
T ⭐	19.8 mm	0.780″	62.1 mm	2.45″	Most Common Men's
U ⭐	19.8 mm	0.780″	62.1 mm	2.45″	Men's Popular
V ⭐	20.2 mm	0.795″	63.4 mm	2.50″	Men's Popular
W	20.6 mm	0.811″	64.6 mm	2.54″	Men's
X	21.0 mm	0.827″	65.9 mm	2.60″	Men's Large
Y	21.4 mm	0.843″	67.2 mm	2.65″	XL Men's
Z	21.9 mm	0.862″	68.5 mm	2.70″	XL Men's
Z+1	22.2 mm	0.874″	69.7 mm	2.74″	XXL Men's
Z+2	22.5 mm	0.886″	70.7 mm	2.78″	XXL Men's
Z+3	22.9 mm	0.902″	71.9 mm	2.83″	Custom
Z+4	23.3 mm	0.917″	73.1 mm	2.88″	Custom
Z+5	23.6 mm	0.929″	74.1 mm	2.92″	Custom
Z+6	23.9 mm	0.941″	75.0 mm	2.95″	Custom

⭐ Size M = Most common women's finger ring size UK

⭐ Size T = Most common men's finger ring size UK

🔵 Blue rows = most popular men's sizes

🌸 Pink rows = most popular women's sizes

👁️ Visual Finger Ring Size Scale – UK Women's & Men's

Women's Most Common Finger Ring Sizes

Proportional circles for the most popular UK women's finger ring sizes. Visual reference only.

14.9 mm

15.2 mm

15.5 mm

M ⭐

15.9 mm

16.2 mm

Men's Most Common Finger Ring Sizes

Proportional circles for the most popular UK men's finger ring sizes. Visual reference only.

17.5 mm

17.8 mm

T ⭐

19.8 mm

20.2 mm

🔄 Finger Ring Size Chart – International Conversion UK 2026

🇬🇧 UK	🇺🇸 US / Canada	🇪🇺 EU / ISO	🇮🇳 India	🇯🇵 Japan	Diameter (mm)	Circ. (mm)
F	3	42	3	4	13.5 mm	42.6 mm
H	4	44	5	6	14.2 mm	44.8 mm
J	4.75	46	7	8	14.9 mm	46.8 mm
L	5.75	48	9	10	15.5 mm	48.7 mm
M	6	49	10	11	15.9 mm	49.9 mm
N	6.5	50	11	12	16.2 mm	50.9 mm
O	7	51	12	13	16.5 mm	51.9 mm
P	7.5	53	13	14	16.9 mm	53.0 mm
R	8.5	55	15	16	17.5 mm	55.1 mm
T	9.5	60	19	20	19.8 mm	62.1 mm
V	10.5	62	21	22	20.2 mm	63.4 mm
X	11.5	65	23	24	21.0 mm	65.9 mm
Z	12.5	68	25	26	21.9 mm	68.5 mm

⚡ Finger Ring Size Chart by Gender & Build – UK Quick Reference

👩 Women's Sizes

Build	UK Range	Default
Petite / Slim	F – I	H
Small Hands	I – K	J
Average Woman	K – N	M ⭐
Medium–Large	N – O	N
Broader Fingers	O – P	O

👨 Men's Sizes

Build	UK Range	Default
Slim Fingers	P – R	Q
Lean Hands	R – S	R
Average Man	S – V	T ⭐
Medium–Large	V – X	W
Broad Fingers	X – Z+2	Y

🖐️ Finger Ring Size Chart by Finger – UK Men & Women

💍

Ring Finger

Women: UK H – N
Men: UK R – V
Engagement & wedding rings

👆

Index Finger

Women: UK L – O
Men: UK S – W
Fashion & cocktail rings

🖕

Middle Finger

Women: UK M – P
Men: UK T – X
Statement rings

🤙

Pinky Finger

Women: UK G – K
Men: UK N – R
Signet & midi rings

👍

Thumb

Women: UK O – S
Men: UK V – Z
Bold statement rings

💎

Midi / Upper Finger

Women: UK A – E
Men: UK D – H
2–3 sizes below base size

📏 How to Use This Finger Ring Size Chart at Home

4 Steps to Find Your Finger Ring Size Using This Chart

Measure your finger circumference in mm

Wrap a thin strip of paper around the base of your finger. Mark where it overlaps, then lay flat against a ruler and note the length in mm. This is your circumference.

Or measure the diameter of an existing ring

Place a well-fitting ring on a flat ruler. Measure across the inner opening from edge to edge in mm. This is your inner diameter.

Find your measurement in the chart above

Match your mm circumference to the Circ. (mm) column, or your mm diameter to the Diameter (mm) column. Read the UK letter size on that row.

Adjust for band width if needed

If your ring is 8 mm or wider, go up ½ a UK size from your chart reading. Narrow bands (3–4 mm) can be ordered at your exact measured size.

📐 Key Formulas for the Finger Ring Size Chart

Diameter → Circumference

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

Example: 15.9 mm × 3.14159 = 49.9 mm → UK Size M (women's)

Circumference → Diameter

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

Example: 62.1 mm ÷ 3.14159 = 19.8 mm → UK Size T (men's)

Inches → Millimetres

mm = inches × 25.4

Example: 0.626″ × 25.4 = 15.9 mm → UK Size M (women's)

💡 Expert Tips for Reading a Finger Ring Size Chart

🌡️Measure at the right time — fingers are largest in the afternoon and after warm activities. For the most wearable daily fit, always measure in the afternoon, not first thing in the morning.
📏Always use mm, not inches — the UK finger ring size chart is based on millimetres. Measuring in inches introduces rounding errors. Use a mm ruler or digital calliper for accuracy.
🔁Each finger is a different size — never assume your sizes are the same across fingers or hands. Your middle finger and ring finger can differ by a full UK letter size. Always measure the specific finger you plan to wear the ring on.
🏋️Knuckle vs base — if your knuckle is wider than the base of your finger, measure both. Your ring must pass over the knuckle. For knuckle-heavy fingers, order the knuckle size and use a ring size adjuster for the base.
💒Wide bands: always size up — UK finger ring size charts are calibrated for standard 2–4 mm bands. Bands 8 mm or wider require ½ to 1 full size up. Wedding bands and wide signet rings are the most common cases.
🔄UK sizes are not the same as EU or US — UK uses letters (A–Z+6), the EU uses circumference in mm (e.g. 49), and the US uses numbers (e.g. 6). Always use the diameter in mm as your universal reference when converting between systems.

🏪 Where to Get Your Finger Ring Size Measured in the UK

💛

Goldsmiths

Professional finger ring sizing A–Z+; free in all UK stores

💎

H.Samuel

Free sizing; full finger ring size chart available in store

🔷

Ernest Jones

Designer range; finger sizing by professional staff

🏰

Beaverbrooks

Full UK sizing service; free resize within 30 days

🧰

DIY Ring Sizer

Plastic ring sizer sets available from UK craft stores for under £5 — measures every finger accurately at home

📱

Online Calculator

Use the calculator at the top of this page — enter your mm measurement for an instant UK finger ring size result

📚 Related UK Ring Size Guides

For gender-specific detail, see our Women's Ring Size Chart UK covering sizes F to P, or our Average Men's Ring Size UK guide covering P to Z+6 with full circumference data. If you need the best size for a specific occasion, visit our Best Ring Sizes for Men page. The UK Assay Office is the official authority on British jewellery standards, including ring hallmarking and sizing conventions used by all UK jewellers.

❓ Finger Ring Size Chart UK – FAQs 2026

What does the UK finger ring size chart look like? ▾

The UK finger ring size chart uses an alphabetical letter system running from A (diameter 11.9 mm) to Z+6 (diameter 23.9 mm). Half sizes are available throughout (e.g. A½, B½). Women's sizes typically fall between F and P, men's between P and Z+2. Each letter corresponds to a specific inner diameter and circumference in mm.

How do I read a finger ring size chart in mm? ▾

Measure your finger circumference or diameter in mm, then find the matching value in the chart's Circ. (mm) or Diameter (mm) column. Read the corresponding UK letter size. If your measurement falls between two sizes, always round up to the next half size for the most comfortable fit. Use the calculator above for an instant result.

What is the most common UK finger ring size for women? ▾

The most common UK women's finger ring size is Size M (diameter 15.9 mm, circumference 49.9 mm). Sizes L, M, and N together account for the majority of women's ring sales at UK jewellers. For engagement rings specifically, sizes K to N are the most commonly purchased in 2026.

What is the most common UK finger ring size for men? ▾

The most common UK men's finger ring size is Size T (diameter 19.8 mm, circumference 62.1 mm). This is the single most stocked men's size at UK jewellers. The broader popular range for men is T to V. If buying a men's ring as a surprise, Size T is the safest default choice.

How is the UK finger ring size chart different from the US chart? ▾

The UK chart uses letters (A–Z+6) based on circumference intervals, while the US chart uses numbers (0–16) based on a different measurement scale. For example, UK Size M (women's) ≈ US Size 6, and UK Size T (men's) ≈ US Size 9.5. Always use the diameter in mm as the universal reference when converting between the two systems.

Are ring sizes the same for every finger on the finger ring size chart? ▾

No. Every finger on every hand has a different size. Your ring finger and middle finger can differ by a full UK letter. Your dominant hand's ring finger is typically ½ to 1 full size larger than your non-dominant hand. Always measure the exact finger you plan to wear the ring on and look it up individually in the finger ring size chart.

What UK finger ring size is a 52mm circumference? ▾

A circumference of 52 mm corresponds to approximately UK Size O½ (diameter 16.7 mm). This falls in the upper women's range and lower unisex range on the UK finger ring size chart. Enter any circumference or diameter value into the calculator at the top of this page for an instant result.