These shoes are so cute. Like, the cutest shoes ever.
Normally, I'm a size 8. I've been a size 8 forever and I own many pairs of TUK shoes, all size 8. These shoes ran a little small, and I had to size up to a 9. Not a huge deal, especially since they don't have a back, so my foot isn't sliding around.
These shoes also don't have great bend, so when you walk, the top of the shoes can hurt your feet. HOWEVER, I recently bought some of those "heel pads" that usually help with heels rubbing on shoes and getting blisters; I just put those on the underside of the top of the shoe, and that seemed to solve the issue!
So, I would overall recommend these mules, just keep in consideration that you may have to get creative to make them wearable.