As others have stated, the elastics are pretty loose. If you are used to croc flip flops you get used to them being a little loose on your feet. I dont know how but they do stay on OK even though they feel large. What I dont like is the annoying thunk thunk flip flop sound when I walk.  Wish the last elastic was up higher on the top of your foot or there was one in the back to keep them from slapping around. Overall they are as comfortable as my other crocs but they look better.  If you have high arches these are fantastic. Updated to drop to a lower score. I find I never wear them bc I dont like how they flap around when I walk.