Aoyama Kiban Store's Japanese-Made High-Grade Go Set (Extra Large Go Board) Go board size: Approximately 45cm x 41cm Board thickness: 17.5cm (5 sun 8 bu) Height: 29cm I understand the go board is made of Japanese Kaya wood, but I am not familiar with the details. The weight cannot be measured due to the lack of a measuring environment, but it is estimated to be around 20-30kg because it is a 5 sun 8 bu legged go board. The items in the images are all that are included, so please purchase only if you can make a judgment based on the images.