Love the support of this flip flops.  Having metatarsalagia and plantars facitis I was afraid I wouldn't be able to wear any type of sandal during the Summer months, but now I can.  Just got these in and really like the arch support. The thong that goes between the toes is uncomfortable, seems like it should be made thinner.  As another reviewer stated if you are in doubt go up a half size or more.  I wear a 9 1/2 but went with the 10 to be safe and they fit fine.