Birkenstock vs Crocs

Detailed size comparison between Birkenstock and Crocs. See side-by-side charts to find out which brand runs bigger or smaller.

Men's Sizing Comparison

Birkenstock

US	UK	EU	CM
3.5	3	36	22
4	3.5	36.5	22
4.5	4	37	22.5
5	4.5	37.5	23
5.5	5	38	23.5
6	5	38	23.7
6.5	5.5	38	24.1
7	6	39	24.6
7.5	6.5	39.5	25
8	7	40	25.4
8.5	7.5	40.5	25.8
9	8	42	26.2
9.5	8.5	42	26.7
10	9	43	27.1
10.5	9.5	43.5	27.5
11	10	44	27.9
11.5	10.5	44.5	28.4
12	11	45	28.8
12.5	11.5	46	29.2
13	12	47	29.6
13.5	12.5	47	30.1
14	13	48	30.5
14.5	13.5	48.5	30.9
15	14	49	31.3
15.5	14.5	49.5	31.8
16	15	51	32.2

Birkenstock runs true to size

Crocs

US	UK	EU	CM
3.5	3	36	22
4	3.5	36.5	22
4.5	4	37	22.5
5	4.5	37.5	23
5.5	5	38	23.5
6	5	38	23.7
6.5	5.5	38	24.1
7	6	39	24.6
7.5	6.5	39.5	25
8	7	40	25.4
8.5	7.5	40.5	25.8
9	8	42	26.2
9.5	8.5	42	26.7
10	9	43	27.1
10.5	9.5	43.5	27.5
11	10	44	27.9
11.5	10.5	44.5	28.4
12	11	45	28.8
12.5	11.5	46	29.2
13	12	47	29.6
13.5	12.5	47	30.1
14	13	48	30.5
14.5	13.5	48.5	30.9
15	14	49	31.3
15.5	14.5	49.5	31.8
16	15	51	32.2

Crocs runs large - size down

Women's Sizing Comparison

Birkenstock

US	UK	EU	CM
3.5	2.5	35	21.5
4	3	35	22
4.5	3.5	35	22.4
5	3	35	22
5.5	3.5	35.5	22.4
6	4	36.5	22.9
6.5	4.5	37	23.3
7	5	37.5	23.7
7.5	5.5	38	24.1
8	6	39	24.6
8.5	6.5	39.5	25
9	7	40	25.4
9.5	7.5	40.5	25.8
10	8	41.5	26.2
10.5	8.5	42	26.7
11	9	42.5	27.1
11.5	9.5	43.5	27.5
12	10	44	27.9
12.5	10.5	44.5	28.4
13	11	45	28.8
13.5	11.5	46	29.2
14	12	46.5	29.6
14.5	12.5	47	30.1
15	13	47.5	30.5

Crocs

US	UK	EU	CM
3.5	2.5	35	21.5
4	3	35	22
4.5	3.5	35	22.4
5	3	35	22
5.5	3.5	35.5	22.4
6	4	36.5	22.9
6.5	4.5	37	23.3
7	5	37.5	23.7
7.5	5.5	38	24.1
8	6	39	24.6
8.5	6.5	39.5	25
9	7	40	25.4
9.5	7.5	40.5	25.8
10	8	41.5	26.2
10.5	8.5	42	26.7
11	9	42.5	27.1
11.5	9.5	43.5	27.5
12	10	44	27.9
12.5	10.5	44.5	28.4
13	11	45	28.8
13.5	11.5	46	29.2
14	12	46.5	29.6
14.5	12.5	47	30.1
15	13	47.5	30.5

Kids/Youth Sizing Comparison

Birkenstock

US	UK	EU	CM
1	0.5	16	10.5
1.5	1	17	11
2	1.5	18	11.5
2.5	2	19	12
3	2.5	20	12.5
3.5	3	21	13
4	3.5	22	13.5
4.5	4	23	14
5	4.5	24	14.5
5.5	5	25	15
6	5.5	26	15.5
6.5	6	27	16
7	6.5	28	16.5
7.5	7	29	17
8	7.5	30	17.5
8.5	8	31	18
9	8.5	32	18.5
9.5	9	33	19
10	9.5	34	19.5
10.5	10	35	20
11	10.5	36	20.5
11.5	11	37	21
12	11.5	38	21.5
12.5	12	39	22
13	12.5	40	22.5
13.5	13	41	23
1	12.5	32	19.5
1.5	13	32	19.9
2	13.5	32.5	20.3
2.5	1	33	20.7
3	2	34	21.2
3.5	2.5	34.5	21.6
4	3	35	22
4.5	3.5	35.5	22.4
5	4	36.5	22.9
5.5	4.5	37	23.3
6	5	37.5	23.7

Crocs

US	UK	EU	CM
1	0.5	16	10.5
1.5	1	17	11
2	1.5	18	11.5
2.5	2	19	12
3	2.5	20	12.5
3.5	3	21	13
4	3.5	22	13.5
4.5	4	23	14
5	4.5	24	14.5
5.5	5	25	15
6	5.5	26	15.5
6.5	6	27	16
7	6.5	28	16.5
7.5	7	29	17
8	7.5	30	17.5
8.5	8	31	18
9	8.5	32	18.5
9.5	9	33	19
10	9.5	34	19.5
10.5	10	35	20
11	10.5	36	20.5
11.5	11	37	21
12	11.5	38	21.5
12.5	12	39	22
13	12.5	40	22.5
13.5	13	41	23
1	12.5	32	19.5
1.5	13	32	19.9
2	13.5	32.5	20.3
2.5	1	33	20.7
3	2	34	21.2
3.5	2.5	34.5	21.6
4	3	35	22
4.5	3.5	35.5	22.4
5	4	36.5	22.9
5.5	4.5	37	23.3
6	5	37.5	23.7

Verdict

When comparing Birkenstock to Crocs, pay attention to the CM/JP measurements as they are the most accurate way to compare fit across brands.

Birkenstock: Birkenstock runs true to size
Crocs: Crocs runs large - size down