Width: 300mm Length: 550mm Thickness: 24mm I purchased this with the intention of using it, but it is unused. I bought it on Amazon. Depending on the time, I purchased it for 1,837 yen, and since the store I bought it from charged 1,100 yen for shipping, I paid just under 3,000 yen in total. Therefore, I am offering it at a bargain price.