They are tight across my feet and I wear a 6 1/2 but ordered a 7. The half dome of foam does not dig deep into my ear canal and yet it seals comfortably. The bottom sole is hard and makes quite a bit of noise on hard surfaces, I. She said they were comfortable and she runs with them. The white and silver are pretty much the same except the white has a white trim around the edges. Love these r soo cute n comfy I wil be ordering another pair soon As I said I really do love these hands. I am using it in kitchen to declutter my kitchen platform. The instructions werent helpful in that regard. They?ll work in a pinch.