XL says they fit mens size 13 - 15. My husband wears a 13 and we couldn't get t h em past his heal. I wear a size 6 in women's and they were too tight on my calfskin.These socks are amazing. We were skeptical at first. After years of wet feet in soaked socks and soaked cleats from football to lacrosse. We thought it was worth a try and these socks are amazing. They truly keep your feet dry. Highly recommend.In 40 degree lake water, these socks kept my feet warm and dry. I launched my kayak in 3-7" of cold water with nothing else but a pair of Crocs and felt nothing but the soft lake bottom. Out of the water, the outside of the socks were dry in minutes. I wear a size 14 shoe and the size XL socks were a perfect fit. Wore them for 6 hours and not one drop of foot sweat or moisture. No "pinch points" anywhere on the sock and the calf is snug. The socks, just like the gloves are absolutely waterproof but not submersible so keep that in mind and follow the size chart. Can't wait to get these into my hiking boots to do some trekking through the wetlands. AWESOME !!!I used these socks for a fall kayaking trip. Wore them with some rubber overshoes. Did great for the majority of the trip, but no doubt that my toes were wet by the end of the day. Could be because water got in the shoes and the socks were "sitting" in water for several hours in a row. I am going to use/try them again under more normal in and out of water situations and see if that makes a difference. Will update review when I do!These “small” socks that range from women's size 7-9 and labeled as small are HUGE. They look like they could fit over my hokas quite nicely. I think they are even too big to fit over my regular walking shoes.These socks fit perfectly to my size. They worked great on my winter hike. They kept my feet warm and provided ample amount of arch support. I would highly recommend these socks and this company. Package came nicely packaged and quickly.I bought these socks to protect my feet from the hot water of my showers. They were very tight and uncomfortable due to having little to no elasticity. Once in the shower, the water running down my legs began seeping into the socks rendering them useless.These socks are comfortable but certainly not waterproof. They might be fine for hunting or hiking but keep them away from water. Once your feet are wet they stay wet until the socks can be removed and hung to dry. Certainly not as advertised.