I have never be much of a flip flop wearer . my last pair I have own for year . I finally have enough of they realize that there must be a better option out there . a friend recommend these to I over reef . I decide to order a pair of both . I order these in Sand Colored x-large -lrb- 11-12 -rrb- . I be a pretty consistent size 11 across the board and find these to fit I perfectly . for reference , I also order the  reef man 's Fanning Flip Flop  these Rainbow flip flop will satisfy the traditionalist , favor a simpler design , a ultra-soft surface and great arch support . the reef 's have a raise heel that really help keep they on my foot , a spongy surface , and be also very comfortable . out of the box , I have have a slight preference for the reef 's , prefer the way they stay on my foot while I walk . after wear the reef 's for a day , the strap start to dig into my right foot , which be slightly smaller than my left , create a blister . I have since be wear the Rainbows a bit more and be start to feel almost as comfortable wear they as the reef which do stick to my foot better . these do not cause I any blister . overall , I would say that the Rainbows be a bit more comfortable , but need break in more than the reef which be more effortless to walk in . if it be not for the blister , the reef would be the clear favorite to I . I think both pair of flip flop just need break in a little more and my foot need a little bit of a callus build up . I be very happy with both pair of flip flop and you could not go wrong with either .