The McDavid Youth HEX Protective Leg Sleeves offer an enhanced fit and comfort while maximizing your protection. The patented 9mm HEX technology features streamlined, graduated HEX that contours around joints for ultimate protection. The hdC moisture management technology keeps these sleeves cool and dry. The youth size is one size fits most with a knee circumference of 10" to 13". They are ideal for basketball, football, volleyball, and more!