I generally wear a size 7.5, so I ordered an 8 after reading some of the reviews that indicated that the boots run small. The boots were HUGE, and I ended up returning them. I would suggest ordering down if you're a half-size.
I bought these for my daughter who wears them daily in the winter/spring rain/snow/mud for romps with our two big dogs and for dogwalking! She loves them! They are comfortable, not too heavy, flexible, and sturdy. Glad I bought them!