"Based on reviews here, I purchased this in a 7 as I usually wear a 6.5 or 7. I have about half an inch worth of space in the back. I definitely could have gone with the 6.5, however, the 7 doesn't flop around on my feet despite being roomy and allowed me to wear them comfortably for several hours right out of the box. Definitely recommend if you're looking for something super comfy with a heel."