Size down 1 from size chart!Hands down the best, most comfortable and truly non binding low cut/ almost no show socks.I am not a diabetic but I only buy no show non binding socks. I have had surgery on both of my feet and my left ankle is fused. My left ankle is about 1.5 inches larger than my right due to the fusion and the fact it is almost always swollen to some degree. Non binding socks are the only ones I can tolerate. These socks do not hinder my swollen left ankle and they do not cause additional pain or sensitivity/sensory issues that I have with my fused ankle. It is hard to explain unless you have a fused ankle. The feeling sometimes that I can get in my ankle when socks are constricting due to swelling turns into a sensory annoyance kinda pain.These socks are a dream! They truly are what they claim to be. I wear a size 11w in a womens shoe because I cannot walk without my custom orthotics in my shoes.I did size down to a medium in these socks because other reviewers mentioned these socks slid off easily. Sizing down, these socks fit me perfect. They do not slid off in my shoes or when I take my shoes off. They have some extra cushion on the footbed and the tops are mess and breathable. I am hard on socks. I go through socks every six months or so. I am forever sold on these. I will be purchasing more. I hope they stick around for a long time because these are the only socks I wear now. They are not completely no show but very close. I love that they are cushioned on the footbed and breathable on top. I love that they are truly non binding around the ankles.I am a forever customer for these socks!They have held up very nicely in the wash and dryer and I can't say enough nice things about them.