This is a handmade lesson bag. It's made large, so it can easily fit large sheet music. (The fifth photo compares it to B4 size paper) The outer fabric is oxford cloth, and the lining is sheeting. Since no interfacing is used, it's not a stiff type, but soft, and suitable as a sub-bag to fold and put in a school bag. It will be folded and shipped. It has been pre-washed, but due to the nature of the fabric, it may transfer color to other items if wet, so please wash it separately. I make them carefully, but as a handmade item by an amateur, there may be some wrinkles or distortions, so please understand this before purchasing. Approximately 44 cm wide x 31 cm long (please allow for some error) No gusset Type...Lesson bag Pattern/Design...Print (piano, musical notes, sheet music) #piano #musicalnotes #sheetmusic #keyboard