This bootie is soo-o-o cute.  I found the size to be right on.  Unfortunately I followed the advise of other reviews and ordered a half size larger than normal.  My regular size would have been perfect.  Ordering a half size larger was a mistake.  But I kept the bootie anyway and did not send it back for my regular size - just didn't want to bother with it.  So I wear thick socks with them and it works just fine.  I get lots and lots of compliments on this bootie.  I think you will love them - they really are adorable looking.