These are awesome for me they're the only brand of no show socks that I wear, no exceptions ever.  I have an average size foot 8.5 medium width and no issues typically with shoes except I need protection at my Achilles which has thin skin and blisters very easily.  My daughter on the other hand hates them.  They rub in the wrong places and don't stay up and in place for her at all.  She is a size 10 has a wide foot with a very high arch and the top of her foot above the arch is very high too.  My point is, these are not for everyone.  My best advice is if youve never worn them before just buy 1 or 2 pairs to try them first.  I would buy them buy the 100 pack if I could.