Thinner than regular mens socks. These are similar weight to dress socks. The photo shows the socks come up past the ankles, but on my husband (US size 12) they are ankle socks, and his feet are narrow and his legs are thin. Ive read so many descriptions about flip flop socks on Amazon, and one must read everything (desprip, specifications, etc) to find size info. The colors are good, these wash well.