I can't wear regular flip flops because the stem between my toes irritates me.  These however are great because the toe cap keeps your foot from moving too far forward.  This is my 3rd pair of these and I am thinking of getting another pair to toss in a drawer for when these die. I wear size 13 shoes, but the 13 Keens were _huge_ on my feet,  These 11.5s fit perfect.  Trivia for the day: here in Hawaii flip flops are called 'slippers',.. or more commonly: 'slippas.'