I'm not saying go for a size 11 if you're a size 9.5, maybe they rub and stretch or something, but yeah, they're a bit hard to get your foot in and out deeply . I have several other Nike flip flops (I don't think they are of good quality) and they didn't fit. I love how comfortable they are, they are the best flip flops I know. I have never owned Gucci flip flops or expensive designer flip flops but as far as I know they are better than Reebok, Puma, adidas. I love how they look and feel. There