The adult elbow contains one 3" X 22" posterior, one 3" X 10" lateral fiberglass splint, two 3" elastic bandages. The child elbow contains one 3" X 18" posterior, one 2" X 8" lateral fiberglass splint, two 2" elastic bandages. Both sizes are available with or without water for fiberglass activation. Adult size recommended for subjects greater than 5'4" tall, child less than 5'4" tall. Please watch the application video for best results.