Most barn door sizes fall anywhere between 36” wide (on the shorter side) by 96” tall (on the longer side). Generally, most standard barn doors are approximately 36” X 84” or 42” X 80” – with enough extra lip to overlap most standard door frames (36” X 80”) by an inch or so.

How tall should my barn door be?

Most standard interior doorways will be 80” tall. If you have a casing around the frame, measure to the casing's outside edge, not the top of the doorway opening. Whatever your final measurement is, add one inch to get your ideal barn door height.

How much taller should a barn door be than the opening?

Barn Door Opening Measurements

Your door's width should be 2 to 3 inches wider than the door opening and 1 inch higher than the dimensions of your opening. The determining factor in how high or how wide you want to go is just how much you want your sliding door to overlap with the opening.