We use 4mm plywood. Please create wonderful pieces with your favorite designs. Because we cut with a fret saw, please allow for some size誤差. There may be cracks on the back of the cut edges or brown spots. If you are concerned about small details or are looking for perfection, please refrain from purchasing. Please refrain from price negotiations. In addition to the 24cm size, we also have 27cm, 21cm, 18cm, and 15cm sizes. We do not have a storage space after cutting, so we will make them to order. Please understand that it will take some time. 27cm - 750 yen 21cm - 460 yen 18cm - 350 yen 15cm - 250 yen Shipping is an additional 200 yen. If you are interested, please comment with the size and number of pieces you would like.