Waterproof Cast Covers for Shower Child Arm Cast Cover for Bandage and Picc Line Reusable Kids Arm Watertight Cast Protector Covers for Broken Hand/Wrist/Finger/Elbow Fit Circumference 6″ to14.5″. Live Freely, Shower Safely: More than just a shower accessory, this cast shower cover arm kids supports safe, clean fun during daily activities.