Oak Stair treads are 1" thick x 11-1/2" wide and available in lengths from 36" to 96". Our Oak RetroFit Treads are 3/4" thick x 11-1/2" wide and have a 1" nose that overhangs the existing stair structure for remodeling or overlaying a staircase without removing the existing tread. https://www.stair-treads.com/stair-treads-and-risers/wood-stair-treads/oak-stair-treads.html