I had wanted black pumps that weren't plain or boring, so I really liked these with the snake-skin like texture.  I had debated about which size to order due to the other reviews, but I decided to start with my normal size, figuring I'd just send it back if it didn't fit (thank goodness for Prime!).  I ordered the 9, the same size as another pair of Anne Klein shoes (Vivioa) in this order.  The Vivioa fit perfectly, but this shoe, the Wystere, was so big that I could stick a couple of fingers behind my heal.  I exchanged them for an 8, and while they are a little snug in the front, they should be fine after I wear them in a bit.  Surprising to order two pairs of Anne Klein shoes and have them fit SO differently.