Shoe Size Converter — US, UK, EU, JP

My size system

My size

Results are approximate. Sizing varies by brand — always try before buying or check brand-specific size guides.

US W	UK	EU	JP (cm)	Foot (cm)
4	2	34	21	21.3
4.5	2.5	34.5	21.5	21.6
5	3	35	22	22.0
5.5	3.5	35.5	22.5	22.4
6	4	36	23	22.9
6.5	4.5	37	23.5	23.2
7	5	37.5	24	23.5
7.5	5.5	38	24	23.8
8	6	38.5	25	24.1
8.5	6.5	39	25	24.5
9	7	40	26	24.8
9.5	7.5	40.5	26	25.1
10	8	41	26.5	25.4
10.5	8.5	42	27	25.7
11	9	42.5	27	26.0

US M	UK	EU	JP (cm)	Foot (cm)
6	5.5	38.5	24	23.5
6.5	6	39	24.5	24.1
7	6.5	40	25	24.4
7.5	7	40.5	25.5	24.8
8	7.5	41	26	25.1
8.5	8	42	26.5	25.4
9	8.5	42.5	27	25.7
9.5	9	43	27.5	26.0
10	9.5	44	28	26.7
10.5	10	44.5	28.5	27.0
11	10.5	45	29	27.3
11.5	11	45.5	29.5	27.6
12	11.5	46	30	27.9
13	12.5	47	31	28.6
14	13.5	48	32	29.2

US Kids	UK	EU	Foot (cm)
1C	0.5	16	9.5
3C	2.5	19	11.4
5C	4.5	21	12.7
7C	6	23	14.0
9C	8	26	15.2
11C	10	28	17.1
13C	12	31	19.1
1Y	13	32	20.0
3Y	2	35	22.0
5Y	4	37	23.5

About the Shoe Size Converter

Why shoe sizes differ

Shoe sizing systems evolved independently in different countries. EU sizes are based on the length of the last in Paris points (⅔ cm). US and UK sizes use different scales for men and women. Japanese sizes are in centimetres.

How to use it

Select your gender, enter your known size in any system, and all other equivalents appear instantly.

EU — used across Europe; same scale for men and women
US Men / US Women — women's sizes run about 1.5 sizes higher than men's for the same foot
UK — similar to US men's but runs about 0.5 sizes smaller
CM (Japan) — foot length in centimetres; the most precise system

Why shoe sizing varies so much between brands

Unlike clothing, shoe sizing has a more direct relationship to foot measurements, but brand lasts (the physical forms used to construct shoes) vary significantly. A UK size 9 in a wide-last trainer may feel like a 9.5 in a narrow-last dress shoe. Foot width is as important as length: most brands offer standard and wide fits, but few offer narrow fits.

Measure your foot — trace your foot on paper, measure length from heel to longest toe in cm
UK size formula — foot length in inches minus 8.67, multiplied by 3: a 26cm foot = 10.24 inches, size = (10.24 - 8.67) x 3 = 4.7, UK size 4.5-5
Width fitting — D or M is standard; E or W is wide; 2E or XW is extra wide; B or N is narrow
Try before buying — foot size changes with age, weight, and time of day (feet swell during the day); always try shoes on in the afternoon

Frequently Asked Questions

How do I measure my foot size at home?

Stand on a piece of paper, trace around your foot, then measure the length from heel to the longest toe in centimetres. Do both feet and use the larger measurement. Evening measurements are slightly larger due to swelling during the day.

What is the difference between US men's and women's shoe sizes?

Women's US sizes are approximately 1.5 sizes larger than men's US sizes for the same physical foot length. A US women's 8 is roughly equivalent to a US men's 6.5.

Why do shoe sizes differ between countries?

Shoe sizing has never been globally standardised. US sizes use one scale, UK sizes use a slightly different scale (typically 1.5 sizes smaller than US men's), and EU sizes are based on the Paris Point (⅔ of a centimetre). Asian sizing often uses foot length in millimetres or centimetres, which is the most precise system.

What is the most accurate way to find my size?

Measure your foot length in centimetres and use that as your primary reference. Stand on paper, trace your foot, and measure the longest dimension heel to toe. Add 0.5–1cm for comfort. This measurement works across all sizing systems.

Do sizes differ for men and women?

Yes — in the US and UK, men's and women's sizes are different scales even at the same number. A US women's size 8 is roughly equivalent to a US men's size 6.5. EU and CM sizing is gender-neutral, based purely on foot length.