Main Compartment: 18"(H) x 9.5"(W) x 4.75"(D) * Secondary Compartment: 16"(H) x 8"(W) x 3"(D) * Upper Front Pouch: 4"(H) x 7"(W) x 2.5"(D) * Lower Front Pouch: 10"(H) x 7"(W) x 2.5"(D) * Capacity: 1520 cu. in. / 25 liters