Somewhat thin, but they'll function well for what we need. The rubber backing does not hold the treads in one place, so we had to buy some two-sided sticky carpet tape. My hub applied the tape to the treads and our polished wood steps. Now the treads don't move at all and they look great! Plus we'll be able to remove the tape to wash the treads in the washer, and then utilize more tape to put them back in place.