I'm a solid size 8 (always) in running shoes. Heeding the other reviewers' advice, I purchased the 7.5 shoes. They were perfect in length, but even with the laces tied (almost too) tightly, I'm still sliding around in there. The funny thing is - they don't look like a wide shoe. They're super cute and look good on my feet. Ohhhh - if only I didn't actually have to walk in them.