Thank you for viewing. Bandai Demon Slayer Flat Pouch Antibacterial specification. The inner fabric is antibacterial treated for peace of mind. Size: Approximately 22.3cm wide, 11.3cm long Please forgive any slight errors due to amateur measurements. It can hold 4-6 masks. It will be shipped in an envelope without cushioning material, so please understand that there may be crushing, scratches, or wrinkles during shipping.