Outside size of the big bag: 41 x 30 x 3cm; Inside size of the big bag: 40 x 28 x 3cm; Outside size of the small bag: 23 x 17 x 1cm; Inside size of the small bag: 20.5 x 16 x 1cm; Fashionable appearance and practical; This bag is made of durable denim fabrics; Velvet material add in the lining very soft and comfortable with shock and water proof function offers more meticulous protection for your notebook; With strap and handle the handle and strap can be collected up; Multi-function carry way hand carry horizontal straps or vertical straps is convenient comfortable and easy to carry; It even has an additional external pocket for storing accessories; Also equipped with a small bag for smartphone card etc.