Which blade fits which skate boot? Here you can find out:

Blade
size
Boot size
Risport Edea Jackson
RF3 Pro, Royal Pro, Royal Elite, Dance Elite RF1 Elite Ladies Mens
2000 Serie 5000 Serie 2000 Serie 5000 Serie
7¼" - - - - - - -
7½" 200 - - - - - -
7¾" 205 210 205-210 - - - -
8" 210-215 215-220 215-220 2 - - -
8¼" 220 225 - 2½-3 3 1-1½ -
8½" 225 230 225-230 - -
8¾" 230-235 235 235-240 4-4½ 2 -
9" 240 240 235-240 4-4½ 5 2½-3 -
9¼" 245-250 245-250 245-250 5-5½ 5½-6 3½-4 4-4½
9½" 255 255 255-260 6-6½ 4½-5 5
9¾" 260-265 260-265 - - 7-7½ - 5½-6
10" 270 270 265-270 7-7½ 8 5½-6
10¼" 275 275-280 275-280 8-8½ 8½-9 6½-7 7-7½
10½" 280-285 285 - 9-9½ 7½-8 8
10¾" 290 290-295 285-290 10 10 8½-9 8½-9
11" 295 300-305 295-300 - - 9½-10 9½-10
11¼" 300 - - - - - -
11½" 305 - 305 - - 10½-11 10½-11

The chart is a guide to help you choose the right blade size. It may occasionally require a different blade size, due to the actual sole length of the skate. The blade sizes are recommended by the respective boot brand, but the blade size should be checked again with the corresponding boot before mounting!