I take a 7.5 in men's new balance shoes, ordered a 7 and these were perfect fit. I've had a few foot surgerys and need custom orthotics. I literally cannot walk very far barefoot without pain. When I'm in my house, these are on my feet. They have held up great for the past year. Light weight and comfortable. I have flat feet and the arch support is good for me.

Other reviewers said they fell apart and are garbage.
I could see that happening if I bought my husband a pair. He would tear them up quickly as he if heavy footed and would wear outside.
I don't recommend for outdoor use often... because the soles are so soft. You step on a rock your going to feel it.