What is a US men's 10 in EU sizing?

A US men's 10 is roughly an EU 43 and a UK 9.5, which corresponds to a foot length of about 27.8 cm.

How does UK sizing differ from US?

UK men's sizes run half a size below US men's sizes, so a US 10 is a UK 9.5.

Should I size up for wide feet?

Prefer a wide (2E) width over a longer shoe. If a wide width is not offered, half a size up is the usual compromise.

Converters

Men's Shoe Size Converter

The most reliable way to buy shoes abroad is to measure your foot, not to trust the label. Enter your foot length in centimetres or inches and get every international size plus a regular or wide fit recommendation.

Men's Shoes — foot length converter

Foot length

Foot width (optional)

Unit

25 cm · 9.84″ foot length

6.5

250

6.5

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Full shoe size chart

Shoe size conversion chart by foot length
Foot (cm)	US	UK	EU	JP	KR	CN	AU	IN	BR	MX	RU
24	5.5	5	38	24	240	38	5.5	5	36	5.5	38
24.5	6	5.5	39	24.5	245	39	6	5.5	37	6	39
25	6.5	6	40	25	250	40	6.5	6	38	6.5	40
25.5	7	6.5	40	25.5	255	41	7	6.5	38	7	40
26	8	7.5	41	26	260	42	8	7.5	39	8	41
26.5	8.5	8	42	26.5	265	43	8.5	8	40	8.5	42
27	9	8.5	43	27	270	44	9	8.5	41	9	43
27.5	9.5	9	43	27.5	275	45	9.5	9	41	9.5	43
28	10	9.5	44	28	280	46	10	9.5	42	10	44
28.5	11	10.5	45	28.5	285	47	11	10.5	43	11	45
29	11.5	11	46	29	290	48	11.5	11	44	11.5	46
29.5	12	11.5	46	29.5	295	49	12	11.5	44	12	46
30	12.5	12	47	30	300	50	12.5	12	45	12.5	47
30.5	13	12.5	48	30.5	305	51	13	12.5	46	13	48
31	13.5	13	49	31	310	52	13.5	13	47	13.5	49
31.5	14.5	14	49	31.5	315	53	14.5	14	47	14.5	49
32	15	14.5	50	32	320	54	15	14.5	48	15	50

How to use this converter

Stand on a sheet of paper and mark the back of your heel and your longest toe.
Measure the distance in centimetres — do this late in the day when feet are largest.
Enter the length (and optionally the width) into the foot-size converter.
Compare the result against the brand guide, since Nike and Asics typically run half a size small.

Why sizes differ between countries

Size labels come from national fit blocks developed decades ago from different population surveys. The US and UK use garment-based numbering, most of Europe derives sizes from body measurements in centimetres, and Japan, Korea and China use their own regional standards. Because no global standard exists, matching your measurements to the chart is always more reliable than matching the label.

Frequently asked questions

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