This tri-fold will help organize your project so you are ready to stitch! When folded it measures approximately 12" x 9". When open it measures 12" x 26". Inside are two large zippered pockets and 2 smaller zippered pockets. The pockets are clear plastic so you can see what is in each pocket. There is a sturdy hook to hang the bag when open. The bag is held shut by two large snaps when closed.