I bought 4 different sizes to find the fit I needed but it didn't happen. I have a wide foot and I usually buy shoes that are 12 wide. If the shoes are wide, an 11 or 11.5 is fine for me. Because the shoes are so roomy and stretchy, I chose a size 11, too big. So I tried 10.5, 10 and 9, none of them worked as they should. I ended up getting 11 in another brand and they fit perfectly.