Shoe Size Conversion Chart

Every size here is tied to the foot length the brand builds it for. Find your foot length in the last columns, then read across to get your US, UK and EU size.

Nike size chart

Nike men's sizes
US Men's	UK	EU	Foot length (cm)	Foot length (in)
6	5.5	38.5	24	9.45
6.5	6	39	24.5	9.65
7	6	40	25	9.84
7.5	6.5	40.5	25.5	10.04
8	7	41	26	10.24
8.5	7.5	42	26.5	10.43
9	8	42.5	27	10.63
9.5	8.5	43	27.5	10.83
10	9	44	28	11.02
10.5	9.5	44.5	28.5	11.22
11	10	45	29	11.42
11.5	10.5	45.5	29.5	11.61
12	11	46	30	11.81
12.5	11.5	47	30.5	12.01
13	12	47.5	31	12.20
14	13	48.5	32	12.60
15	14	49.5	33	12.99

Nike women's sizes
US Women's	UK	EU	Foot length (cm)	Foot length (in)
5	2.5	35.5	22	8.66
5.5	3	36	22.5	8.86
6	3.5	36.5	23	9.06
6.5	4	37.5	23.5	9.25
7	4.5	38	24	9.45
7.5	5	38.5	24.5	9.65
8	5.5	39	25	9.84
8.5	6	40	25.5	10.04
9	6.5	40.5	26	10.24
9.5	7	41	26.5	10.43
10	7.5	42	27	10.63
10.5	8	42.5	27.5	10.83
11	8.5	43	28	11.02
12	9.5	44.5	29	11.42

How Nike fits: read the full guide

Adidas size chart

Adidas men's sizes
US Men's	UK	EU	Foot length (cm)	Foot length (in)
4.5	4	36 2/3	23	9.06
5	4.5	37 1/3	23.5	9.25
5.5	5	38	24	9.45
6	5.5	38 2/3	24.5	9.65
6.5	6	39 1/3	24.5	9.65
7	6.5	40	25	9.84
7.5	7	40 2/3	25.5	10.04
8	7.5	41 1/3	26	10.24
8.5	8	42	26.5	10.43
9	8.5	42 2/3	26.5	10.43
9.5	9	43 1/3	27	10.63
10	9.5	44	27.5	10.83
10.5	10	44 2/3	28	11.02
11	10.5	45 1/3	28.5	11.22
11.5	11	46	29	11.42
12	11.5	46 2/3	29	11.42
12.5	12	47 1/3	29.5	11.61
13	12.5	48	30	11.81
13.5	13	48 2/3	30.5	12.01
14	13.5	49 1/3	31	12.20

Adidas women's sizes
US Women's	UK	EU	Foot length (cm)	Foot length (in)
5	3.5	36	22	8.66
5.5	4	36 2/3	22.5	8.86
6	4.5	37 1/3	23	9.06
6.5	5	38	23.5	9.25
7	5.5	38 2/3	24	9.45
7.5	6	39 1/3	24.5	9.65
8	6.5	40	25	9.84
8.5	7	40 2/3	25.5	10.04
9	7.5	41 1/3	26	10.24
9.5	8	42	26.5	10.43
10	8.5	42 2/3	26.5	10.43
10.5	9	43 1/3	27	10.63
11	9.5	44	27.5	10.83
12	10.5	45 1/3	28.5	11.22

How Adidas fits: read the full guide

New Balance size chart

New Balance men's sizes
US Men's	UK	EU	Foot length (cm)	Foot length (in)
6	5.5	38.5	24	9.45
6.5	6	39.5	24.5	9.65
7	6.5	40	25	9.84
7.5	7	40.5	25.5	10.04
8	7.5	41.5	26	10.24
8.5	8	42	26.5	10.43
9	8.5	42.5	27	10.63
9.5	9	43	27.5	10.83
10	9.5	44	28	11.02
10.5	10	44.5	28.5	11.22
11	10.5	45	29	11.42
11.5	11	45.5	29.5	11.61
12	11.5	46.5	30	11.81
13	12.5	47.5	31	12.20
14	13.5	49	32	12.60

New Balance women's sizes
US Women's	UK	EU	Foot length (cm)	Foot length (in)
5	3	35	22	8.66
5.5	3.5	36	22.5	8.86
6	4	36.5	23	9.06
6.5	4.5	37	23.5	9.25
7	5	37.5	24	9.45
7.5	5.5	38	24.5	9.65
8	6	39	25	9.84
8.5	6.5	40	25.5	10.04
9	7	40.5	26	10.24
9.5	7.5	41	26.5	10.43
10	8	41.5	27	10.63
10.5	8.5	42	27.5	10.83
11	9	42.5	28	11.02
12	10	44	29	11.42

How New Balance fits: read the full guide

Asics size chart

Asics men's sizes
US Men's	UK	EU	Foot length (cm)	Foot length (in)
6	5	39	24	9.45
6.5	5.5	39.5	24.5	9.65
7	6	40	25	9.84
7.5	6.5	40.5	25.5	10.04
8	7	41.5	26	10.24
8.5	7.5	42	26.5	10.43
9	8	42.5	27	10.63
9.5	8.5	43.5	27.5	10.83
10	9	44	28	11.02
10.5	9.5	44.5	28.5	11.22
11	10	45	28.75	11.32
11.5	10.5	46	29	11.42
12	11	46.5	29.5	11.61
12.5	11.5	47	30	11.81
13	12	48	30.5	12.01
14	13	49	31	12.20

Asics women's sizes
US Women's	UK	EU	Foot length (cm)	Foot length (in)
5	3	35.5	22	8.66
5.5	3.5	36	22.5	8.86
6	4	37	23	9.06
6.5	4.5	37.5	23.5	9.25
7	5	38	24	9.45
7.5	5.5	39	24.5	9.65
8	6	39.5	25	9.84
8.5	6.5	40	25.5	10.04
9	7	40.5	25.75	10.14
9.5	7.5	41.5	26	10.24
10	8	42	26.5	10.43
10.5	8.5	42.5	27	10.63
11	9	43.5	27.5	10.83
12	10	44.5	28.5	11.22

How Asics fits: read the full guide

Width letters

Length is only half the fit. US widths use letters, and the same letter means a different width for men and women.

Men's widths
Letter	Width
B	Narrow
D	Standard / Medium
2E (EE)	Wide
4E (EEEE)	Extra wide
6E	Extra-extra wide

Women's widths
Letter	Width
2A (AA)	Narrow
B	Standard / Medium
D	Wide
2E (EE)	Extra wide

Frequently asked questions

Is a US 9 the same in every brand?

No. A US 9 men's is built for a 27 cm foot at Nike, New Balance and Asics, but Adidas maps its sizes on a UK scale and lands a little shorter. The differences are small, half a size at most, but they are enough to make a shoe feel tight. Compare by foot length when switching brands.

How do I convert men's to women's sizes?

In US sizing, add 1.5 to a men's size to get the women's size at Nike, New Balance and Asics (men's 8 = women's 9.5). Adidas uses a one-size gap instead (men's 8 = women's 9). UK and EU sizes are unisex, so they do not change.

Why do EU sizes have fractions like 42 2/3?

Adidas, and a few other brands, step their EU sizes in thirds because the EU (Paris point) scale moves in 6.67 mm steps while a half US size is closer to 4.2 mm. Rounding to whole numbers would make two different shoes share one label.