Altra Women's Size Chart

USA UK EUR
5.5 3.5 36
6 4 37
6.5 4.5 37.5
7 5 38
7.5 5.5 38.5
8 6 39
8.5 6.5 40
9 7 40.5
9.5 7.5 41
10 8 42
10.5 8.5 42.5
11 9 43