TRUSOX Soccer Length Sock. As seen on some of the best in the Premier League. TRUSOX offer more control and connection to the field thanks to grippers on the inside and outside of the sock that lock feet in shoe.By locking feet into the shoe, TRUSOX make for easier change of direction and shot control.If you want to wear TRUSOX with your actual team sock, order the Crew Length. For match play when a team sock is required, players at all levels simply cut the foot out of their team sock. Then wear the team sock as a leg sleeve over their TRUSOX Crew Sock. Some use tape as a final step, but it's not required.SIZING HELP:Small - Men's size 3 - 6.5, women's size 4-7.5Medium - Men's size 7 - 9.5, women's size 8-10.5Large - Men's size 10+, women's size 10.5+