I am normally a 7.5.  I read reviews that said to size up, so I ordered an 8.  I slid my toes in through the ankle strap hole and FOUGHT to stretch the ankle strap to get around my heel.  It was a battle royale.  Once I got them both on, it felt like my ankles were being STRANGLED.  My circulation was being cut off.  I looked in the mirror and I had MUFFIN TOP SPILLOVER!  And I have slender ankles, no cankles!  I'm not quite sure how these have been rated so well (4.5 stars and 1,757 reviews at time of writing this review).......what the WHAT!