Bag interior size: 15.7×11.6 inches; exterior size: 16.5×3.5×14 inches. Includes removable shoulder strap to style for carrying. Fits up 16.5 inches laptop/tablet/ultrabook. Huge-roomy and two main compartments can store more items like books/Ipad pro/laptop/ tablet/pens/wallet/macbookclothes, etc. Built-in shockproof foam prevents impact force to protect your important items like laptop, Ipad, etc. Belt in back is convenient for fixing on the handle of luggage case.