This is a black MUJI (Mujirushi Ryohin) nylon mesh bag-in-bag, A4 size. The external dimensions are A4 size, and A4-sized items did not fit inside. This is a used item. Thank you for your understanding. [About the product] MUJI, Mujirushi Ryohin, nylon mesh bag-in-bag, bag-in-bag, external dimensions: approximately 20.5cm (height) x approximately 30.5cm (width) x approximately 6cm (bottom center) (measured by a layman), black, used item, no odor. Thank you for looking (*´-`)