The adult ankle kit contains one 4" X 28" posterior, one 4" X 32" stirrup fiberglass splint, and two 6" elastic bandages. The child ankle kit contains one 3" X 20 " posterior, one 3" X 26" stirrup fiberglass splint, and two 4" elastic bandages. Both sizes are available with or without a 3.4 oz water source for fiberglass activation. Adult size is recommended for patients greater than 5'4" tall, child less than 5'4" tall. Please review the application video for best results.