SockTower Adult Big Boy Girl Youth Kid Sports Athletic Crew Baseball Softball Cotton Knee High Socks Youth/Adult Shoe=4-6 (Foot=7-9") Red-white-Royal blue Youth/ Adult Shoe= 4Y-6. Best to fit Foot= 7" to 9". FOOT LENGTH: Before Stretch= 6.5. After=8.5. CALF: Before Stretch= 12.5. After=15.5 (try on model foot =8.5). Embedded Arch Support helps reduce foot fatigue. Elastic in foot arch- ensures perfect fits. Double Cushioned sole, toe and heel; Soft comfortable, absorption Rubber and spandex at the socks top prevents socks movements. 82% Cotton, 3% Rubber, 7% Nylon, 8% Spandex NON-TOXIC & ODORLESS MATERIAL. Fasten texture- Professional long-term use Quality, SIZE L= 3.5 oz= 99 g. SIZE S= 3 oz= 85 g. USA Tax payer; Item located and ships from USA. Import/Made in Taiwan (manufacturer direct; premium standard of quality control)