Let me start by saying I've lost count of how many pairs of Crocs I have, so I am a big fan. I have a pair of brown sueded Crocs flats that I love that are size 7, so I ordered a pair of these flats in black in the same size. When they arrived they were so small I couldn't get them on. I checked sizes and yes my others were 7s, and so were these. Had to pay shipping, again, to send them back, and pay shipping again to order a different color in a size 8 (since the blacks were only available in a 7), thus pretty much wiping out the sale price. Seems like uniformity of size would be a given.