"I wear size 10 and I ordered size 10. They are snug and can't wear them with socks, but when I put knee highs on they feel better. I wore my Dizzy West Rain Boots at work from 7am to 630 pm. Later in the day they started rubbing the back of my leg and hurting my feet. Where I work, I can change into tennis shoes at 3:45. I will make sure when I wear this boot I will put a large band aid on the back of my legs where the boots rub and bring other shoes to change into. I had not only parents but student telling me they like my Dizzy West Rain Boots! You can wear them anytime you want even when it is not raining."