Avia Women's Size Chart:
U.S.A.
5
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
U.K.
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
Avia Men's Size Chart:
U.S.A.
8
8.5
9
9.5
10
10.5
11
11.5
12
12.5
13
U.K.
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
10.5