First off, if your a half size I say go DOWN. Sketchers recommends up but I'm a true 8-l/2 and based on previous purchases I've decided to go with the 8 (not the 9 as recommended). The fit PERFECT! I would have swimmed in a 9. They have great arch support (I have plantar fasciitis). They cushion your foot upon each landing. I wish I would have tried these before, they are on my next purchase list. I will wear as houseshoes and on limited walking trips (until I see how long I can last due to the plantar fasciitis). VERY happy with my purchase.