These slippers are great for indoor use and also good for outdoor use as the sole is rubber.  I'm going to wear these around my apartment on carpet and when i go home on weekends to the family home, on tile.

These are way better than my last pair at brookstone, the tempur pedic pair that cost $60 and was of lower quality.

I usually wear size 10.5 and bought a size 12 as other reviewers mentioned.  These run small so get a size to size and a half larger. You will NOT regret it. 12's fit me perfectly!