Please take a look at the profile section. There are important notes listed there. This is a durable laminated fabric abacus case for 23-digit abacuses. It can be modified for 27-digit abacuses. It is thinner than commercially available products. The material is cotton with a vinyl coating, so it won't get wet inside in light rain. Size: For 23-digit abacus: Approximately 36cm long x 10cm wide To make it easier to take out the abacus, the end of the abacus sticks out of the bag by about 2cm. The closure is Velcro, which is easy for even small children to open and close, as snaps can be difficult to use and may hit the beads. *Because we cut in bulk, the pattern may appear differently from the image. Please be aware of this. Immediate purchase is OK. However, if you have any of the following changes, please contact us before or immediately after purchase. *Can be changed to 27-digit abacus size (27-digit abacus: Approximately 42cm long x 10cm wide). Also, you can add a loop to hang it on a school bag or a desk hook. (See the 3rd reference photo) Please contact us before purchasing. If you purchase without contacting us about changes, we will send the 23-digit version without a loop. Please note that we will not exchange it after shipping. We carefully finish each item with care, but as these are handmade by amateurs, there may be slight imperfections in the stitching or alignment. Please refrain from purchasing if you are looking for perfection. We appreciate your understanding before you make a purchase. Pattern/Design: Checkered