This is for sanshin (Okinawan three-stringed instrument). The sizes available are only the Large (for sanshin semi-hard cases) and Small (for sanshin soft cases) sizes, as indicated in the photos. Please compare the size of your case with the listed sizes to determine the fit. Made by La Campanella, which produces and sells handmade instrument straps. It comes with a small matching fabric pouch. You can fold it up and keep it in the case, and it's well-received for providing peace of mind by protecting your precious sanshin and case from rain, even in a sudden downpour. The black plain fabric we've sourced is black on the front and a smoky silver on the back (though the back won't be visible during use). It's a medium-weight, sturdy fabric that seems like it will reliably protect the sanshin and case from rain. We have a ready-made one for sanshin, so we can ship it immediately. It's water-repellent fabric, not completely waterproof, and is designed to protect from rain. The opening is treated with elastic like a shampoo hat, so you can adjust it. Only suitable for backpack-style sanshin cases! When the rain cover is on, the side handles of the case cannot be used. By putting this cover on during your usual outings, you can prevent your case from getting dirty or damaged, and it will last longer (*^_^*). I also have rain covers for sanshin, shamisen (three-stringed Japanese instrument), and ukuleles, so please click on my icon to take a look. We can also make shamisen and ukulele rain covers with this fabric. The cost of this fabric has increased significantly, so the price will be +200 yen from my usual rain cover selling price. Regardless of the instrument type, you will receive a 200 yen discount per item when purchasing multiple items. Please feel free to invite your friends. I will create a separate listing, so please comment. Please check my profile for information on when I will be unavailable due to events, business trips, or travel. Please let me know your schedule if you need it urgently.