Navy Medium Hiker Socks - High Performance Hiking Sock Designed with Better Arch Support and Better Fit Than Cotton Tube Socks These Socks Were Designed for Hikingand Walkers Medium (sock Size Medium, Ladies Shoe Size 5-10, Mens Shoe Size 4 5-8 5), Large (sock Size Large, Ladies Shoe Size 11-12, Mens Shoe Size 9-12 5)