This lightweight wooden box helps protect valuable go bowls. The modern design ensures minimal exposure to moisture and light. It closes with a decorative ribbon.
Edit: Sanded it lightly and took new photos.
Outer dimensions are roughly 14in x 8in (35cm x 19cm), with dual internal storage for bowls of 6in x 6in (15.5cm square).
These is one is used, but new boxes can be purchased from Japan (roughly $120 plus shipping) with a Custom Order.