I ordered a PINK MARBLE MOSAIC in size 5.5-6.5. I usually wear a size 8, so when it comes to water shoes I have to go down a few sizes. They were too small. I could wear them but they pinched my toes so I gave them to someone who wears a size 7 or 7.5 and she liked the size 5.5-6.5. If I ordered 7.5-8.5 they might be too big. Nice shoes.