It is the L size of the pouch that flattens when the zipper is opened. You can easily embroide, attach patches, and arrange your own pouches. Since it is flat, it is easy to iron and embroidery is also easy to embroide. Also, if you combine two pouches of the same size and close the zipper, it becomes a pouch that is twice the size, and you can change the size according to your purpose and mood.