Oxford cloth, thick fabric with interfacing. The gusset is 8cm, height 32cm x width 32cm when laid flat. Shoulder straps are 51cm long and 3cm wide, made with sturdy belt tape. Includes a bottom board and a large zippered pocket on the back. A crossbody strap is available for an additional fee. A4 files fit inside. The inner bag is made of cotton fabric with interfacing on the top opening. Carefully crafted, it has a light and stylish pattern. The leaves are about 5cm x 4cm. Thank you for looking.