I purchased these new and used them a few times. I'm selling them as a set of two to anyone interested. ① Nylon Mesh Bag-in-Bag A4 Size, Vertical, Gray Lightweight and durable nylon mesh fabric. Fits A4-sized notebooks and clear files. Vertical design makes it easy to put in a backpack. Outer dimensions: Approximately 34 x 27 x 3 cm ② Nylon Mesh Bag-in-Bag A5 Size, Horizontal, Ivory Lightweight and durable nylon mesh fabric. Fits A5-sized notebooks. Outer dimensions: Approximately 18 x 25 x 3 cm