These paper skeletons are printed double-sided on heavy-weight shimmer paper, which gives them the appearance of mother-of-pearl. They are expertly lasercut with a precise level of detail. They are based on real specimens, and accurately depict their size and color, or in this case, lack-there-of. Specimens in the Wunderkammer Relics series come on a beautiful 5.5" x 8.5" backing, perfect for safe keeping or as a lovely gift! Resin safe.