This particular bench is 18 3/4″ tall, 6′ long and 12″ deep. The bench top (the seat) and legs are made from 1 x 12 poplar. Because of the length, the side rails are 1 x 6 to support any weight in the middle — plus the height of the rails is 1/3 of the overall height of the bench making for visually pleasing proportions. For a shorter bench, a 1 x 4 could be used instead. The round holes in the legs are 6” from the bottom, which combined with the rail height, divides the legs into thirds (6 + 6 + 6 = 18). I used poplar for the bench because it is widely available in 12” widths and it is great for painting.