Deciding sizes for flip flops is really hard and it’s not the same as a shoe size. Shoes don’t need to account for the length of the wearers toes whereas flip flops do. There’s also personal preference to consider. Some people like to have their feet go right to the edge of the flip flop. Some people like to have a buffer between their feet and the edge of the flip flop. We recommend people that are on the border of a size should go up a size.
 
SIZE
Kids S
Kids L
XS
SMALL
MEDIUM
LARGE
XL
UK
7-9
10-12
1-2
3-5
6-7
8-10
11-13
EURO
24-27
28-30
34-36
37-39
40-41
41-43
45-47
USA
8-10
11-13
2-3
4-6
7-8
9-11
12-14
Length CM
17
19
23
25
27
29
31