Main dual zippered compartment: 17" H x 12" W x 4" D * Second dual zippered compartment: 17" H x 12" W x 3" D * Third dual zippered compartment: 12.5" H x 10" W (interior dimension) - features 3 pen holders, 1 accessory pocket and 1 Velcro pocket * Front zipper pocket: 12" H x 9.5" W (interior dimension) with 2 mesh pockets * Padded back panel, adjustable padded shoulder straps, fabric haul handle. Handle Height: up to 15 inch