I usually wear a size 5. That's what I ordered and they fit great. However They did come with blue ink marks on one shoe so I will be returning this pair. Once the refund/return is complete I'll buy again and see if a new pair in good condition comes and I will update my review on comfort etc. For now I'd have to say as with any shoe it will have to be worn in on the back of the ankle but other than that they seem comfortable enough to run errands in and chase around the  kiddos. :)