Slipper very comfortable . I wear 71/2 ordered the 8 but felt that it just barely made the cut for size of my foot. But really no extra room for tightening . My feet are slender so if you feet or wide or slightly in between wide & slender these aren't for you . These slippers run small in size & they don't come in half sizes . Kinda disappointed with Nike on this issue. Even thought about going up to the size 9 to have extra comfort  room .