Asics vs Brooks shoe sizes

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

Men's sizes

9 of 20 shared men's US sizes have the same EU size. At men's US 9, Asics is EU 42.5 and Brooks is EU 42.5.

Pink: Asics and Brooks print a different EU size.

US	Asics UK	Asics EU	Asics cm	Brooks UK	Brooks EU	Brooks cm
4	3	36	22.5	–	–	–
5	4	37.5	23.5	4	37.5	–
5.5	4.5	38	24	4.5	38	–
6	5	39	24.5	5	38.5	–
6.5	5.5	39.5	25	5.5	39	–
7	6	40	25.5	6	40	–
7.5	6.5	40.5	25.75	6.5	40.5	–
8	7	41.5	26	7	41	–
8.5	7.5	42	26.5	7.5	42	–
9	8	42.5	27	8	42.5	–
9.5	8.5	43.5	27.5	8.5	43	–
10	9	44	28	9	44	–
10.5	9.5	44.5	28.25	9.5	44.5	–
11	10	45	28.5	10	45	–
11.5	10.5	46	29	10.5	45.5	–
12	11	46.5	29.5	11	46	–
12.5	11.5	47	30	11.5	46.5	–
13	12	48	30.5	12	47.5	–
13.5	12.5	48.5	30.75	–	–	–
14	13	49	31	13	48.5	–
15	14	50.5	32	14	49.5	–
16	15	51.5	33	15	50.5	–

10 of 16 shared women's US sizes have the same EU size. At women's US 9, Asics is EU 40.5 and Brooks is EU 40.5.

Pink: Asics and Brooks print a different EU size.

US	Asics UK	Asics EU	Asics cm	Brooks UK	Brooks EU	Brooks cm
5	3	35.5	22	3	35.5	–
5.5	3.5	36	22.5	3.5	36	–
6	4	37	23	4	36.5	–
6.5	4.5	37.5	23.5	–	–	–
7	5	38	24	5	38	–
7.5	5.5	39	24.5	5.5	38.5	–
8	6	39.5	25	6	39	–
8.5	6.5	40	25.5	6.5	40	–
9	7	40.5	25.75	7	40.5	–
9.5	7.5	41.5	26	7.5	41	–
10	8	42	26.5	8	42	–
10.5	8.5	42.5	27	8.5	42.5	–
11	9	43.5	27.5	9	43	–
11.5	9.5	44	28	9.5	44	–
12	10	44.5	28.5	10	44.5	–
12.5	10.5	45	28.75	10.5	45	–
13	11	46	29	11	45.5	–

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