Naturalistic Skulls are made with high quality, food-safe resin with a non-porous surface that’s easy to clean, with a special coating to help prevent the development of harmful bacteria. Perfect for smaller sized terrestrial snakes, lizards, and geckos. SIZES: Small - 5" L x 2.5" W x 2.5" H Medium - 8" L x 4.25" W x 4" H