Minimum height is 10". Select H1 for file bars run front to back (as depicted). Select H2 for file bars run side to side (lateral). Bar sticks up 3/8" above drawers. Minimum width for letter-sized drawer run front to back is 13-3/8" O.D with 1/2" sides (13-5/8" with 5/8" sides). Minimum width for legal-sized drawer run front to back is 16-3/8" O.D. with 1/2" sides (16-5/8" with 5/8" sides). Our default configuration for front to back files is left justified. Our default configuration for lateral files is front justified. If you would like a different configuration or for any widths greater than the minimum size, please email picture or drawing with order. https://www.eagledovetaildrawers.com/products.php