Size Guide

Jacob & Isaac  UK US  EU
6 5 6 39
6.5 5.5 6.5 39.5
7 6 7 40
7.5 6.5 7.5 40.5
8 7 8 41
8.5 7.5 8.5 41.5
9 8 9 42
9.5 8.5 9.5 42.5
10 9 10 43
10.5 9.5 10.5 43.5
11 10 11 44
11.5 10.5 11.5 44.5
12 11 12 45
12.5 11.5 12.5 45.5
13 12 13 46