These are lightweight house slippers only.  I would not even recommend walking outside with these. Other reviewers say these run small, I disagree.  I have bought size 10 & the size 10 slipper is perfect in length but very roomy in the area where you put your feet in and it will stretch over time as well & I have wider than normal feet.  Not enough to be a bother but they should make it a little snuggier.  These will last at most 6 months of daily use, it will get very frayed where your heel rubs against the flat area and the outer cord area of slipper will start to fray.  Basically these are disposible slippers... if they were $7.50 each i would buy a 5 pack like socks but at this price I'm going to shop around for a more longer lasting slipper.