Perfect Size: 3 Main Compartments in all, only 12oz. The foremost compartment is 7.5 X 10.5 inches. The middle zippered is 8 X 11 inches--with 2 extra pouches, 2 pens pouches, and a key chain. The LARGEST zippered is 11 X 16inches. The Strap phone pocket size is: 3.3x6.5inch (WxL) with an earphone hole. 2 water bottle holders (up to 2.4 inches) with a contraction band.
