I always order 9 when getting the full slip on shoes, 8.5 when ordering mules. They're usually slightly larger than I need, but I mostly go without socks due to edema issues. These were boats, though. Longer and wider than normal Skecher 9s run. I had actually started the refund process, but my feet swelled up and I couldn't wear any of my other shoes comfortably. Keeping them for just such times like now when my feet are balloons.