adidas Nitrocharge Guard Supports blood backflow to the center of the body Soft synthetic lining for high comfort Hard shell with highly protective front plate Shin Guard sizing: X-small height range 3'11"-4'6", Small height range 4'7"-5'2" Shin Guard sizing: Medium height range 5'3"-5'10", Large height range 5'11"-6'2", X-Large height range 6'3+