This case can hold three shamisen. It has two small compartments. When you close one side, the drawer on the other side opens due to internal pressure, so I don't think there are any issues with airtightness. External dimensions: Width: 50.5 cm Depth: 29.5 cm Height: 119 cm (Please allow for slight variations as these are amateur measurements.) I have used this case with care, but please understand that there are some changes in color and minor scratches due to aging. If you have any questions, please ask in the comments. Thank you.