Using Japan's indigenous sawara cypress resistant to moisture and acid, it quickly removes extra moisture without losing shape, and the cross-section is beautifully finished. -SIZE-11 18cm (約4合(go) Approx. 4 go) Inside dimension: Approx. 15L x 15W x 7.5H cm (Approx. 5.9W x 5.9D x 2.9H inches)12 21cm (約5合(go) Approx. 5 go) Inside dimension: Approx. 18L x 18W x 7.5H cm (Approx. 7W x 7D x 2.9H inches)13 24cm (約6合(go) Approx. 6 go) Inside dimension: Approx. 21L x 21W x 7.5H cm (Approx. 8.2W x 8.2D x 2.9H inches)12 27cm (約8合(go) Approx. 8 go) Inside dimension: Approx. 24L x 24W x 7.5H cm (Approx. 9.4W x 9.4D x 2.9H inches)12 30cm (約1升(go) Approx. 1 syo) Inside dimension: Approx. 27L x 27W x 7.5H cm (Approx. 10.6W x 10.6D x 2.9H inches)