Nike vs Asics shoe sizes

Nike and Asics don't always agree. Here is every US size side by side, from each brand's own chart.

Men's sizes

11 of 22 shared men's US sizes have the same EU size. At men's US 9, Nike is EU 42.5 and Asics is EU 42.5.

Pink: Nike and Asics print a different EU size.

US	Nike UK	Nike EU	Nike cm	Asics UK	Asics EU	Asics cm
3.5	3	35.5	22.5	–	–	–
4	3.5	36	23	3	36	22.5
4.5	4	36.5	23.5	–	–	–
5	4.5	37.5	23.5	4	37.5	23.5
5.5	5	38	24	4.5	38	24
6	5.5	38.5	24	5	39	24.5
6.5	6	39	24.5	5.5	39.5	25
7	6	40	25	6	40	25.5
7.5	6.5	40.5	25.5	6.5	40.5	25.75
8	7	41	26	7	41.5	26
8.5	7.5	42	26.5	7.5	42	26.5
9	8	42.5	27	8	42.5	27
9.5	8.5	43	27.5	8.5	43.5	27.5
10	9	44	28	9	44	28
10.5	9.5	44.5	28.5	9.5	44.5	28.25
11	10	45	29	10	45	28.5
11.5	10.5	45.5	29.5	10.5	46	29
12	11	46	30	11	46.5	29.5
12.5	11.5	47	30.5	11.5	47	30
13	12	47.5	31	12	48	30.5
13.5	12.5	48	31.5	12.5	48.5	30.75
14	13	48.5	32	13	49	31
14.5	13.5	49	32.5	–	–	–
15	14	49.5	33	14	50.5	32
15.5	14.5	50	33.5	–	–	–
16	15	50.5	34	15	51.5	33
16.5	15.5	51	34.5	–	–	–
17	16	51.5	35	–	–	–
17.5	16.5	52	35.5	–	–	–
18	17	52.5	36	–	–	–
18.5	17.5	53	36.5	–	–	–
19	18	53.5	37	–	–	–
19.5	18.5	54	37.5	–	–	–
20	19	54.5	38	–	–	–
20.5	19.5	55	38.5	–	–	–
21	20	55.5	39	–	–	–
21.5	20.5	56	39.5	–	–	–
22	21	56.5	40	–	–	–

11 of 17 shared women's US sizes have the same EU size. At women's US 9, Nike is EU 40.5 and Asics is EU 40.5.

Pink: Nike and Asics print a different EU size.

US	Nike UK	Nike EU	Nike cm	Asics UK	Asics EU	Asics cm
3.5	1.5	33.5	21	–	–	–
4	1.5	34.5	21	–	–	–
4.5	2	35	21.5	–	–	–
5	2.5	35.5	22	3	35.5	22
5.5	3	36	22.5	3.5	36	22.5
6	3.5	36.5	23	4	37	23
6.5	4	37.5	23.5	4.5	37.5	23.5
7	4.5	38	24	5	38	24
7.5	5	38.5	24.5	5.5	39	24.5
8	5.5	39	25	6	39.5	25
8.5	6	40	25.5	6.5	40	25.5
9	6.5	40.5	26	7	40.5	25.75
9.5	7	41	26.5	7.5	41.5	26
10	7.5	42	27	8	42	26.5
10.5	8	42.5	27.5	8.5	42.5	27
11	8.5	43	28	9	43.5	27.5
11.5	9	44	28.5	9.5	44	28
12	9.5	44.5	29	10	44.5	28.5
12.5	10	45	29.5	10.5	45	28.75
13	10.5	45.5	30	11	46	29
13.5	11	46	30.5	–	–	–
14	11.5	47	31	–	–	–
14.5	12	47.5	31.5	–	–	–
15	12.5	48	32	–	–	–
15.5	13	48.5	32.5	–	–	–
16	13.5	49	33	–	–	–
16.5	14	50	33.5	–	–	–
17	14.5	50.5	34	–	–	–
17.5	15	51	34.5	–	–	–
18	15.5	51.5	35	–	–	–
18.5	16	52	35.5	–	–	–
19	16.5	52.5	36	–	–	–
19.5	17	53	36.5	–	–	–
20	17.5	53.5	37	–	–	–
20.5	18	54	37.5	–	–	–
21	18.5	54.5	38	–	–	–
21.5	19	55	38.5	–	–	–
22	19.5	55.5	39	–	–	–
22.5	20	56	39.5	–	–	–

Brands measure cm differently: some print the shoe's length, others your foot's length. We match brands by US size, never by cm.