These eyes can make your animal lifelike,it is much more fun than ordinary eyes.and it is easy to use with clay. If use properly ,these eyes can be baked in oven. Materials Flatback glass cabochons with printed paper Quantity You will receive 100pcs 50 pairs, the colors and styles are sent randomly Size They are small size, diameter is 6mm about 0.24 inches, thickness about 3mm about 0.12 inches These eyes are intricateartistic colorful designs, you can bake into clay, polymer clay sculptures, glue into props or into the walls for cave trolls, making monster book. Or make a halloween jewelry necklace, earrings bracelet. This is NOT safety eye, Not contact lenses, it is flatback dome glass with a printed paper on the back. Great for art craft DIY.