These slip on, lightweight, very comfortable shoes will get quite a workout this summer! I ordered them in white in a size 7 C/D, which is slightly smaller than the 7.5 E that I normally buy in shoes. Being completely "sold" on Propet brand for my troubled feet, I've discovered the shoes and sandals normally run a bit large/wide, and since these aren't adjustable, the smaller size is a perfect fit. Lots of elastic means the left shoe (which on me, that foot swells) fits as comfortably as the right shoe. The outer sole is stable and offers excellent traction on any surface with the added benefit of shock absorption in the heel. That's important if you have bone spurs on your heels or are simply on your feet quite a bit. They're obviously a sporty design versus "fashion styling". The inner sole is removable for those with orthotics, but (for me) are perfectly comfortable on their own. They're the most comfortable right-out-of-the-box shoe I own, and I'll be purchasing at least one more color, especially at the discounted Amazon price. Ahhhhhhhhh! No more foot/ankle pain!