Main compartment is 20″H x 14″W x 8″D with zippered mesh pouches and retaining straps. 2-side dump pouches measuring 9-1/2″H x 5″W x 2-1/2″D with double zipper pulls. 2-front pouches: lower pouch is 6″H x 13″W x 3″D with 3-mesh pockets inside; top pouch measures 14″H x 10″W x 3″D with 3-pen pockets and 2 magazine/radio pouches, with hook & loop retaining straps, inside.