Size conversions may vary per brand and style and may not fully match the conversions shown below. If you are not sure about your size, please contact us for assistance. info@extrabutterny.com
Our standard sizing runs in US Sizing
Unisex is typically in US Mens Sizing unless stated otherwise.
Adult Sizing
| Crocs US Size |
UK Men Size |
UK Women Size |
EU Sizes |
Length (cm) |
| M4W6 |
3 |
4 |
36-37 |
22 |
| M5W7 |
4 |
5 |
37-38 |
23 |
| M6W8 |
5 |
6 |
38-39 |
24 |
| M7W9 |
6 |
7 |
39-40 |
25 |
| M8W10 |
7 |
8 |
41-42 |
26 |
| M9W11 |
8 |
9 |
42-43 |
27 |
| M10W12 |
9 |
10 |
43-44 |
28 |
| M11 |
10 |
11 |
45-46 |
29 |
| M12 |
11 |
12 |
46-47 |
30 |
| M13 |
12 |
13 |
48-49 |
31 |
| M14 |
13 |
14 |
49-50 |
32 |
| M15 |
14 |
15 |
50-51 |
33 |
| M16 |
15 |
16 |
51-52 |
34 |
| M17 |
16 |
17 |
52-53 |
35 |
Crocs Kids
| Typical Age |
Little Kids (Under 1) |
Little Kids(1-2 Years Old) |
Little Kids(2-5 Years Old) |
Big Kids (Ages 5+) |
| Heel to Toe Length |
31⁄4″ |
37⁄8″ |
41⁄8″ |
41⁄2″ |
47⁄8″ |
51⁄8″ |
51⁄2″ |
57⁄8″ |
61⁄8″ |
61⁄2″ |
67⁄8″ |
71⁄8″ |
71⁄2″ |
77⁄8″ |
81⁄8″ |
81⁄2″ |
87⁄8″ |
91⁄8″ |
91⁄2″ |
| US |
C1 |
C2 |
C3 |
C4 |
C5 |
C6 |
C7 |
C8 |
C9 |
C10 |
C11 |
C12 |
C13 |
J1 |
J2 |
J3 |
J4 |
J5 |
J6 |
| UK |
- |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
1 |
2 |
3 |
4 |
5 |
6 |
| EU |
- |
17-18 |
18-19 |
19-20 |
20-21 |
21-22 |
22-23 |
23-24 |
24-25 |
25-26 |
26-27 |
27-28 |
28-29 |
29-30 |
30-31 |
31-32 |
32-33 |
33-34 |
35-36 |
| Japan |
- |
- |
- |
12 |
13 |
14 |
15 |
15.5 |
16.5 |
17.5 |
18 |
18.5 |
19 |
19.5 |
20 |
21 |
22 |
23 |
24 |
| Korea |
- |
- |
- |
115 |
120 |
130 |
140 |
150 |
155 |
165 |
175 |
180 |
190 |
200 |
210 |
220 |
230 |
240 |
250 |
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