This is a wooden tray purchased from a general goods store. I painted directly onto the surface of the material with acrylic paints. Pearlescent paint was used for some of the dots. The top surface has been finished with varnish, but the paint may peel if scratched by hard objects. Please avoid washing the tray with water. When it gets dirty, wipe it gently. The photo shows the finished product after varnishing. Width: 17.5 cm Length: 11.0 cm Thickness: 1 cm