These will work but they weren't what I was expecting. I'm too lazy to return them so I'll use them until they break down and I'll buy the ones I really want the next time.

The pic shows the tread on a stair tread that I will be installing and it measures 37.5" wide x 11.5" wide. Not sure what size the stairs are that were used in the picture for this item but it is deceiving so I included my own.