These were my first pair. I will say that i have rather flat and (56 year old) arthritic feet. I've also had bunion surgery. These shoes are a joy to wear, as comfortable as slippers. No toe bunching. I get compliments on the design everywhere i go! Other women seem to like that the mermaid is distinctive, but somehow also subtle. Size wise, i usually wear a 7 1/2 - 8. I bought a 7 1/2 in these, and they fit with normal socks.