I thought I had ordered a size 10.5 but received a 10. My size varies between models even in the same brand. The 10 was good on the length, 1/2" too long, but the shoe fits very snug on the sides. I can wear it without discomfort but it would bother some who do not like side pressure. The toe box is slightly narrow on the little toe side and I sometimes get slight rubbing on right foot, but still wearable. I use these for tennis and hope these will loosen as they wear, then they would be perfect.