Made of 100% tempered safety glass. Backed in white safety vinyl. Designed for all paints. Smooth, non-porous surface improves color mixing. Reusable and economical unlike other palettes. Easy to clean--no mess, no dried paint build-up. Dried oil paint is removed with light scraping. Dried acrylic paint peels off. Recommended by professional artists and art instructors. Classic palette shape measures 10 3/4 in. x 13 in. x 1/8 in. and has a round thumb hole. Rectangular palette is 11 in. x 14 in. x 1/8 in.