Width 39 x Height 30 x Depth 3 cm With inner pocket. When the Velcro on the bottom (30cm long) is closed, it becomes a bag shape, and when opened, it becomes a cover shape. * Photos of the bag with the bottom Velcro closed and filled with 2L of water from a plastic bottle are included. Please refer to them. If you have any questions or inquiries, please feel free to comment.