Our socks are available in 4 different shoe sizes (3/5.5, 6/8,8.5/11.5, 12, 14). We use elastane in all our socks, so that they fit closely to your feet and remain in place. We all have feet of different lengths, proportions and sizes: to do this, it is important to try your hiking socks in the store before buying them. Also try out your socks before going on a long hike