Am so grateful I came across these socks as I was getting blisters on the inside of my insole from running & before I threw the trainers a colleague told me to try them as he had the men's version and swore by them, this being the cheaper option than new runners I thought I would give them a go! So glad I did, no more rubbing! They look good too and they feel great on! Have run outside in foul cold weather and not had cold feet and not hot in the gym either! I'm between a 5-6 and went for the bigger size and had no problems!