Review on Tilos 3Mm Waterproof Neoprene Fin Socks - Ideal For Scuba Diving, Snorkeling, Swimming, Watersports, Hiking & More! by Khalil Hopp

I got these for my trip to Hawaii, and I wasn't sure on sizing since it's mens (and me being female). If it helps anyone I wear a solid size 10m (with longer toes) womens and I got a medium size in mens (or the 8 1/2 to 10 I think) and it's a TAD big, so I could have probably gotten away with the small for them to be more snug but as they are they do fit in the fin just fine, haven't tested them in water yet. Hope that helps if anyone's not sure about sizing. Otherwise the quality and durability seems to be there, it has little rubbery things on the contact part(bottom of the sock) that I like too, so you could wear them walking on rough rocks on the beach wading etc.