Please see the profile section. There are important notes listed. This is a durable laminated fabric abacus case for 23-digit abacuses. It can be changed to fit a 27-digit abacus. It is thinner than commercially available products. The material used is cotton with a vinyl coating, so it won't get wet inside in light rain. Size: For 23-digit abacus: Length approx. 36cm x Width 10cm To make it easier to take out, the abacus's edge sticks out about 2cm from the bag. The closure is Velcro, which is easy to open and close even for small children, 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. * It can be changed to fit a 27-digit abacus (for 27-digit abacus: Length approx. 42cm x Width 10cm). Also, you can add a loop to hang it on a school bag or a desk hook (see the third reference photo). Please contact us before purchasing. If you purchase without contacting us for changes, we will send the 23-digit case 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 purchase. #AbacusCase