XS Sock Size: 3-5 Girls: 7-13 Boys: n/a Womens: n/a Mens: S Tube Length in Inches: 14-16 S Sock Size: 6-8 Girls: 13-6 Boys: 9-4 Womens: 4-6 Mens: n/a Tube Length in Inches: 19-20 M Sock Size: 9-11 Girls: 6-9 Boys: 4-9 Womens: 6-9 Mens: 4.5-9 Tube Length in Inches: 23-34 L Sock Size: 10-13 Girls: n/a Boys: n/a Womens: 10-13 Mens: 9-12 Tube Length in Inches: 29-30