🌈Quantity and Size: You will receive 20pcs enamel chemistry charms in total, 4 styles, 5pcs per style. Each charm is about 21~27.5mm in length, 12~25.5mm in width, 1.5mm in thickness, 1.6~2mm in hole size. (1 inch = 25.4mm or 1mm = 0.0393 inch). ✨Nice Material: Chemistry themed charms are made of alloy and plated with enamel, with a delicate appearance, relatively sturdy, not easy to break or fade, and can be reused, bringing you a good user experience. 🎀Special Design: Designed with chemistry as the theme, it is exquisitely designed with bright colors and diverse styles, featuring microscope, test tube cup, chemical molecules, and other appearances. It can add different colors to your handmade creations, making it very suitable for DIY production. 👍Versatile Usage: You can use these chemical molecules charms for jewelry making to create a variety of personalized artifacts such as necklaces, earrings, key chains, pendants, bag hanging decorations and other fashion accessories. 💝Thoughtful Gift: You can use these science charms to make meaningful crafts for your friends, family, and lover, and give them as gifts during holidays such as Christmas, Thanksgiving, Halloween, Valentine's Day, birthdays, and New Year to strengthen your relationship with each other.