Thanks guys! I forgot to check back & this is how we installed the paper towel holder. John cut a 2 3/4" wide x 22" long x 3/4" thick board. He round it on the back corners so it would slide between the window facing and curve in the wall of the Oliver wall above the window. He painted it white. In our 2021 it is across from the kitchen sink in the dining nook. Best part about this installation is it's easily removable as there is no tape, screws, etc as the board simply slides in the space.