These are our newest knife accessory additions to Japanese Knife Imports. These bags are silk, inside and out, and are designed to keep your knife safe and looking good. These bags are made of the same material and patterns found in Japanese Kimono. The first ones we brought in are in two sizes... one fits a 240-2700mm Wa-Gyuto (with saya on) and the other fits 240-270mm yanagiba or sujihiki (with saya on). We will be bringing more in the future. You can expect to see them up on our site soon.