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 are many colors to choose from, I highly recommend this product. Name, they're made to get wet, they really aren't. If you wet them and don't dry them, they will stink. You can machine wash them and tumble dry them low, but this will cause them to age faster and they won't last as long. They are really intended for relaxing at home or for shopping. They're a bit difficult to walk in, they can be ridden in, I do sometimes, but honestly I prefer proper shoes for that.