Radical Cuff

Small: 2.15" dia, 1.17"-1.14" opening

6"-6.75" wrist circumference 

Medium: 2.35" dia, 1.31"-1.28" opening

6.5"-7.25" wrist circumference

Large: 2.5" dia, 1.45"-1.42" opening

7"-7.75" wrist circumference