Size charts / Nike to ASICS size conversion

Nike to ASICS size conversion

Nike and ASICS sizes side by side for the same US size, men's and women's. The EU and UK labels come from each brand's own size chart. They compare size labels and do not assess product fit.

Size charts: Nike · ASICS

Men's

Scroll within the table to compare sizes.

Nike and ASICS men's sizes by US size
US	Nike EU	ASICS EU	Nike UK	ASICS UK
3.5	35 1/2	35 1/2	3	2.5
4	36	36	3.5	3
4.5	36 1/2	37	4	3.5
5	37 1/2	37 1/2	4.5	4
5.5	38	38	5	4.5
6	38 1/2	39	5.5	5
6.5	39	39 1/2	6 (39)	5.5
7	40	40	6 (40)	6
7.5	40 1/2	40 1/2	6.5	6.5
8	41	41 1/2	7	7
8.5	42	42	7.5	7.5
9	42 1/2	42 1/2	8	8
9.5	43	43 1/2	8.5	8.5
10	44	44	9	9
10.5	44 1/2	44 1/2	9.5	9.5
11	45	45	10	10
11.5	45 1/2	46	10.5	10.5
12	46	46 1/2	11	11
12.5	47	47	11.5	11.5
13	47 1/2	48	12	12
13.5	48	48 1/2	12.5	12.5
14	48 1/2	49	13	13
14.5	49	49 1/2	13.5	13.5
15	49 1/2	50 1/2	14	14

Women's

Scroll within the table to compare sizes.

Nike and ASICS women's sizes by US size
US	Nike EU	ASICS EU	Nike UK	ASICS UK
4	34 1/2	34 1/2	1.5	2
4.5	35	35	2	2.5
5	35 1/2	35 1/2	2.5	3
5.5	36	36	3	3.5
6	36 1/2	37	3.5	4
6.5	37 1/2	37 1/2	4	4.5
7	38	38	4.5	5
7.5	38 1/2	39	5	5.5
8	39	39 1/2	5.5	6
8.5	40	40	6	6.5
9	40 1/2	40 1/2	6.5	7
9.5	41	41 1/2	7	7.5
10	42	42	7.5	8
10.5	42 1/2	42 1/2	8	8.5
11	43	43 1/2	8.5	9
11.5	44	44	9	9.5
12	44 1/2	44 1/2	9.5	10
12.5	45	45	10	10.5
13	45 1/2	46	10.5	11

Questions

Is a Nike EU size the same as a ASICS EU size?: Not always. For 12 of 24 shared US men's sizes, the EU label differs. For example, US 9.5 is EU 43 at Nike and EU 43 1/2 at ASICS.
What is a Nike US 9.5 in ASICS?: At ASICS, US 9.5 men's is EU 43 1/2 and UK 8.5. At Nike, it is EU 43 and UK 8.5.
Which sizes does the table cover?: Men's: US 3.5 to US 15 (24 sizes). Women's: US 4 to US 13 (19 sizes). The table shows only the US sizes that both charts list.
Does this table tell me how a shoe fits?: No. It compares the size labels of the Nike and ASICS charts. Fit depends on the model; check the maker's guide for the model you want.