Risport Size Comparison Chart
American Ladies American Mens French Centimeters Approximate Blade Size Heel/Toe
8   24 17.0 6 1/3
9   25 17.5 6 2/3
10   26 18.0 6 2/3
11   27 18.5 7
11.5   28 19.0 7 1/3
12   29 19.5 7 1/3
1   30 20.0 7 1/2
1 1/2 1 31 20.5 7 3/4
2 1 1/2 31 1/2 21.0 7 3/4
2 1/2 2 32 21.5 8
    33 22.0 8 1/3
3 2 1/2 34 22.5 8 1/3
3 1/2 3 34 1/2 23.0 8 2/3
4 3 1/2 35 23.5 8 2/3
4 1/2 - 5 4 - 4 1/2 36 24.0 9
5 1/2 5 37 24.5 9 1/3
6 5 1/2 37 1/2 25.0 9 1/4 - 9 1/2
6 1/2 - 7 6 - 6 1/2 38 25.5 9 1/2 - 9 3/4
7 1/2 7 39 26.0 9 3/4
8 7 1/2 40 26.5 9 3/4 - 10
8 1/2 8 40 1/2 27.0 10
9 8 1/2 41 27.5 10 1/3
9 1/2 9 42 28.0 10 1/2
10 9 1/2 42 1/2 28.5 10 1/2 - 10 3/4
10 1/2 10 43 29.0 10 2/3
11 10 1/2 44 29.5 11
  11 - 11 1/2 45 30.0 11 1/2
  12 46 30.5 11 3/4
  13 47 31.0 12