Ouch! I have giant blisters on the back of both heels, each measuring about 1 inch in diameter. These shoes are PAINFUL. Reef makes my ultimate favorite flat (their tan tropic solid)-- they're comfortable, supportive, and I get compliments on them every time I wear them. They're all out of my size online so I thought I'd explore a new model & ordered these. Super bummed because they look cute (hence the 2 stars) but I don't think I can ever put them on my feet again after wearing them just to a BBQ last night. I would return them if I could. Love the brand & other shoes I've bought from them, just incredibly disappointed by this product.