Bench Dimensions A bench between 42 and 52 inches in length will seat two adults comfortably. A booth-style table with a 48-inch bench on each side will fit a family of three children and two adults. On average, benches have a height of 18 inches and a depth of approximately 17 1/2 inches.Click to see full answer. Accordingly, what is a good height for a bench?Height: Standard bench height for decks and outdoor benches is typically between 18″ and 20″. Keep in mind that is assuming the table you’re building the benches for hovers around 29-30 inches, the standard height for tables.Additionally, how tall should a window bench be? six inches Keeping this in view, what is the standard bench width? Standard width for a bench is 14″ wide and standard height is 18″ high (same as a chair).What is the standard chair height?Standard Height Chairs – A standard table is 30” tall. Your standard chair seat is about 18” off of the ground. Standard chairs tend to have taller backs than counter or bar height stools.