42 inch Red Oak Natural (Prefinished Clear) Retro Left Return Stair Tread

A:The single return tread measurements INCLUDE the return, so a 42" tread has a 40-3/4" body + the 1-1/4" return for an overall width of 42". This link has a drawing detailing the measurements: https://woodstairco.com/faq/standard-stair-tread-dimensions.html Remember LEFT and RIGHT are relative from the BOTTOM of the staircase looking up: https://woodstairco.com/faq/closed-vs-left-or-right-return-treads.html

A:The inside "throat" length of all single return treads is 1-1/4" shorter than the tread because the tread is made from a closed tread of the same length. For example, these will be the inside measurements of each single return tread: [42": 40-3/4"] [48": 46-3/4"] [54": 52-3/4"] [60": 58-3/4"]