I found that these socks fit me well - women's 6.5 foot and were very comfortable.  What I didn't like is that they started showing signs of wear after one use.  The toes were sewn well and didn't come apart there but the forefoot part immediately shows wear.  I don't think they will last long before it is completely worn through since it started from the first time I wore them.  I am not extremely heavy either at 130 pounds and I didn't run a marathon in them either - just regular walking around the house.