Sizes: 2-3.5, 4-5.5, 6-7.5, 8-9.5

O = 0% or NO reinforcement

I = 45% reinforcement

III = 55% reinforcement

V = 75% reinforcement

X = 100% of FULL reinforcement

- Customize the strength of the shank for each dancer

- Dancers can use two different shanks (left/right) if necessary