Ring Size Chart in Inches UK – Complete 2026 Guide

Ring Size Chart in Inches UK – 2026

The complete ring size chart in inches — every UK size A to Z+2 with inner diameter & circumference in inches, US & EU conversion, how to measure at home & free calculator

🇬🇧 UK Sizes A – Z+2 📏 Inches Reference 🔄 US & EU Conversion 👩 Women's & Men's 🧮 Free Calculator ✅ 2026 Updated

0.576″

📏 Average Women's
UK Ring Diameter (N)

0.770″

📏 Average Men's
UK Ring Diameter (T)

A–Z+2

🇬🇧 Full UK
Size Range

÷25.4

🔢 mm to Inches
Conversion Formula

ℹ️

Ring Size Chart in Inches – UK 2026 Overview

The UK ring sizing system uses letters (A through Z+2), but many people prefer to measure their finger in inches using a ruler or tape at home. This page provides every UK ring size listed with its exact inner diameter in inches and circumference in inches, plus US and EU equivalents, women's and men's average sizes, how to convert mm to inches, and a free ring size calculator. The average UK women's ring size is UK N (diameter 0.576″) and the average UK men's ring size is UK T (diameter 0.770″).

How to Read a Ring Size Chart in Inches

Every UK ring size has an exact inner diameter in inches and a circumference in inches. Measure your finger with a tape or strip of paper, note the length in inches, then match to the chart below. Divide any mm value by 25.4 to convert to inches.

⭐ Women's avg: UK N ⭐ Men's avg: UK T 📏 mm ÷ 25.4 = ″ 🔄 Full A–Z+2 chart

🔢 Ring Size in Inches – Conversion Formulas

mm to Inches (Diameter)

Diameter (″) = Diameter (mm) ÷ 25.4

Example: UK N = 14.63 mm ÷ 25.4 = 0.576 inches

mm to Inches (Circumference)

Circumference (″) = Circumference (mm) ÷ 25.4

Example: UK N = 45.96 mm ÷ 25.4 = 1.809 inches

Inches to mm (Reverse)

mm = Inches × 25.4

Example: 0.770″ × 25.4 = 19.56 mm = UK T (men's average)

Circumference from Diameter

Circumference (″) = Diameter (″) × π (3.1416)

Example: 0.576″ × 3.1416 = 1.810 inches = UK N

🧮 Ring Size Chart in Inches – Free Calculator UK

Enter your finger measurement in inches to find your UK ring size

Your UK Ring Size

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📊 Full Ring Size Chart in Inches – UK A to Z+2 (2026)

UK Size	Diam. (inches)	Circ. (inches)	Diam. (mm)	Circ. (mm)	🇺🇸 US Size	🇪🇺 EU Size	Best For
A	0.459″	1.442″	11.63 mm	36.6 mm	—	37	Children/XS
B	0.480″	1.508″	12.19 mm	38.3 mm	1	38	Children/XS
C	0.496″	1.559″	12.60 mm	39.6 mm	1.5	40	XS
D	0.512″	1.610″	13.01 mm	40.9 mm	2	41	XS Women
E	0.528″	1.660″	13.41 mm	42.1 mm	2.5	42	Small Women
F	0.543″	1.708″	13.82 mm	43.4 mm	3	43	Small Women
G	0.559″	1.757″	14.22 mm	44.7 mm	3.5	45	Small Women
H	0.575″	1.807″	14.62 mm	45.9 mm	4	46	Small Women
I	0.587″	1.844″	14.91 mm	46.8 mm	4.25	47	Small Women
J	0.598″	1.880″	15.22 mm	47.8 mm	4.5	48	Women
K	0.614″	1.929″	15.61 mm	49.0 mm	5	49	Women
L	0.630″	1.979″	16.00 mm	50.3 mm	5.5	50	Women
M	0.646″	2.029″	16.40 mm	51.5 mm	6	51	Women
N ⭐	0.576″	1.809″	14.63 mm	45.96 mm	6.5	52	Women's Avg ⭐
O ⭐	0.677″	2.127″	17.20 mm	54.1 mm	7	54	Women Popular
P ⭐	0.693″	2.178″	17.60 mm	55.3 mm	7.5	55	Women Popular
Q	0.677″	2.127″	17.20 mm	54.1 mm	8	54	Slim Men
R	0.689″	2.169″	17.50 mm	55.0 mm	8.5	55	Lean Men
S	0.701″	2.203″	17.80 mm	56.0 mm	9	56	Average Slim Men
T ⭐	0.770″	2.419″	19.56 mm	61.4 mm	9.5	61	Men's Avg ⭐
U ⭐	0.786″	2.469″	19.96 mm	62.7 mm	10	63	Men Popular
V ⭐	0.803″	2.521″	20.40 mm	64.1 mm	10.5	64	Men Popular
W	0.819″	2.572″	20.78 mm	65.3 mm	11	65	Athletic Men
X	0.834″	2.619″	21.18 mm	66.6 mm	11.5	67	Broad Men
Y	0.850″	2.670″	21.59 mm	67.8 mm	12	68	Large Build
Z	0.866″	2.720″	22.00 mm	69.1 mm	12.5	69	XL Build
Z+1	0.874″	2.746″	22.20 mm	69.7 mm	13	70	XL Custom
Z+2	0.906″	2.846″	23.01 mm	72.3 mm	13.5	72	Custom

⭐ UK N = average UK women's ring size (0.576″ diameter)

⭐ UK T = average UK men's ring size (0.770″ diameter)

📏 Divide any mm value by 25.4 to get inches

🔄 All values are inner diameter / inner circumference

📐 How to Measure Ring Size in Inches at Home – UK Guide

Step-by-Step: Find Your UK Ring Size Using Inches

Cut a strip of paper or use a flexible tape measure

Cut a thin strip of paper roughly 4 inches long and 0.25 inches wide — or use a soft measuring tape. Make sure it is not stretchy.

Wrap it around your finger at the knuckle

Wrap snugly around the base of the finger you intend to wear the ring on. Make sure it passes over the knuckle — rings must fit both. Mark where the paper meets with a pen.

Measure the length in inches

Lay the paper flat against a ruler and read the measurement in inches. This is your inner circumference in inches. Match this to the Circ. (inches) column in the chart above.

Convert to diameter if needed

Divide your circumference (inches) by π (3.1416) to get your inner diameter in inches. E.g. 1.809″ ÷ 3.1416 = 0.576″ diameter = UK N.

Match to the UK ring size chart in inches above

Find your measurement in the Circ. (inches) or Diam. (inches) column to identify your UK letter size. If between two sizes, always size up for comfort.

📌 Important Measuring Tips

🌡️Measure at the right time: Fingers swell in heat and shrink in cold. Measure mid-afternoon when your fingers are at a normal, resting size — not first thing in the morning or after exercise.
👉Dominant hand runs larger: Your dominant (writing) hand is typically 0.5 to 1 UK size larger than your other hand. Measure the actual finger you will wear the ring on.
📏Measure three times: Take three separate measurements in inches and use the average. Wrap tension varies, so multiple readings improve accuracy.
🔑Knuckle check: If your knuckle is larger than your finger base, measure both. Order the size that fits the knuckle — rings can be adjusted at the base more easily.
💍Wide bands need sizing up: If ordering a band wider than 6 mm, add half a UK size to your measured size in inches. Wide bands press more surface area onto the finger, making them feel tighter.

🔍 Three Ways to Get Your Ring Size in Inches

📄

Paper Strip Method

Wrap a strip around your finger, mark the overlap, measure the length in inches. Match to Circ. (inches) column. Most common home method.

📐

Ruler / Calliper Method

Use a digital calliper to measure the inner diameter of an existing ring in inches. Match to Diam. (inches) column in the chart above.

🧵

String or Dental Floss

Wrap string around your finger, mark with a pen, lay flat and measure in inches. Divide by π for diameter, or match to circumference column directly.

💡 Already Have a Ring? Measure It in Inches for an Instant Size Match

Place an existing well-fitting ring on a ruler and measure its inner diameter in inches across the widest point of the inside hole. Find that measurement in the Diam. (inches) column in the chart above to instantly identify your UK ring size — no wrapping or measuring needed. This is the most accurate at-home method.

⭐ Most Popular UK Ring Sizes in Inches – Quick Reference

UK Size	Diam. (inches)	Circ. (inches)	🇺🇸 US	🇪🇺 EU	Who It Fits
L ⭐	0.630″	1.979″	5.5	50	Women – Small Average
M ⭐	0.646″	2.029″	6	51	Women – Average
N ⭐	0.576″	1.809″	6.5	52	Women – UK Average ⭐
O ⭐	0.677″	2.127″	7	54	Women – Above Average
T ⭐	0.770″	2.419″	9.5	61	Men – UK Average ⭐
U ⭐	0.786″	2.469″	10	63	Men – Common
V ⭐	0.803″	2.521″	10.5	64	Men – Common

💡

Why UK Jewellers Prefer mm — But You Can Always Use Inches

UK jewellers officially measure ring sizes in millimetres and use alphabetical UK letter sizes. However, many customers find it easier to measure at home using a ruler marked in inches. Every mm measurement divides by 25.4 exactly to give you the equivalent in inches — so any UK ring size chart in inches is simply the standard mm chart converted. The values on this page are precise to 3 decimal places for accuracy.

❓ Ring Size Chart in Inches – FAQ UK

What is the average UK women's ring size in inches? ▾

The average UK women's ring size is UK N, which has an inner diameter of 0.576 inches (14.63 mm) and a circumference of 1.809 inches (45.96 mm). Sizes L, M, N and O account for roughly 60% of all women's ring sales in the UK.

What is the average UK men's ring size in inches? ▾

The average UK men's ring size is UK T, which has an inner diameter of 0.770 inches (19.56 mm) and a circumference of 2.419 inches (61.4 mm). Men's ring sizes typically fall between UK Q and UK W.

How do I convert mm ring size to inches? ▾

Divide the millimetre value by 25.4 to convert to inches. For example, a ring with an inner diameter of 19.56 mm converts to 19.56 ÷ 25.4 = 0.770 inches. This works for both diameter and circumference measurements.

My measurement is 1.85 inches circumference — what UK size is that? ▾

A circumference of 1.85 inches (approximately 47.0 mm) corresponds to approximately UK J to UK K. Find the closest value in the Circ. (inches) column in the full chart above. If you are between two sizes, always choose the larger size for a comfortable fit.

Is a ring size chart in inches the same as US ring sizes? ▾

No. US ring sizes use a numerical system (e.g. 6, 6.5, 7) that does not directly correspond to inches. The inches values refer to the physical inner measurement of the ring in inches. Use the US column in the chart above to convert between UK letter sizes and US numerical sizes alongside the inches measurement.

Can I measure my ring size at home using a ruler in inches? ▾

Yes. Wrap a strip of paper around your finger, mark the overlap, then lay it flat against a ruler marked in inches. Read the measurement as your circumference in inches, then match it to the Circ. (inches) column in the chart above. Alternatively, measure the inner diameter of an existing ring using a ruler and match to the Diam. (inches) column.

Does ring size in inches differ between UK, US and EU? ▾

The physical measurement in inches (actual inner diameter or circumference) is universal — a finger measuring 0.770 inches in diameter is the same everywhere in the world. Only the size labelling system differs: UK uses letters (A–Z+2), US uses numbers (1–13.5), and EU uses circumference in mm (36–72). The chart above shows all three alongside the inches values.

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Ring Size Chart in Inches UK – 2026

Ring Size Chart in Inches – UK 2026 Overview

How to Read a Ring Size Chart in Inches

Enter your finger measurement in inches to find your UK ring size

Step-by-Step: Find Your UK Ring Size Using Inches

Cut a strip of paper or use a flexible tape measure

Wrap it around your finger at the knuckle

Measure the length in inches

Convert to diameter if needed

Match to the UK ring size chart in inches above

📌 Important Measuring Tips

Paper Strip Method

Ruler / Calliper Method

String or Dental Floss

💡 Already Have a Ring? Measure It in Inches for an Instant Size Match

Why UK Jewellers Prefer mm — But You Can Always Use Inches

Ring Size Chart in Inches – UK 2026 Overview

How to Read a Ring Size Chart in Inches

Enter your finger measurement in inches to find your UK ring size

Step-by-Step: Find Your UK Ring Size Using Inches

Cut a strip of paper or use a flexible tape measure

Wrap it around your finger at the knuckle

Measure the length in inches

Convert to diameter if needed

Match to the UK ring size chart in inches above

📌 Important Measuring Tips

Paper Strip Method

Ruler / Calliper Method

String or Dental Floss

💡 Already Have a Ring? Measure It in Inches for an Instant Size Match

Why UK Jewellers Prefer mm — But You Can Always Use Inches

📌 More Ring Size Resources on This Site

🌐 External Reference Resources