PowerSplint fits kids and childrens fingers that are 1.75" or longer. Please see our Size Chart for the full measurements. PowerSplint is a kids or childs finger splint brace guard that offers maximum finger protection and works much better than finger tape. Please note: PowerSplint does not work for thumbs. PowerSplint offers finger protection for pinky fingers and other other three non-thumb fingers. PowerSplint is the best pinky finger splint for athletes.