They are made of , erase your mistakes! It is great for party favors, prize bins, giveaways, goody bags and more. It is a compact size and practical stationery kids. Suitable for home, school, kindergarten use. Features - ColorAssorted Color - Material: Rubber. - Size: About 5.60X2.50X1.50cm/2.20X0.98X0.59inch. - The adorable cartoon appearance design can attract students' attention and bring joy to children. - This product effectively plays the role of an eraser and can erase the handwriting you wrote with a pencil. - Small size, light weight, it is easy to carry and store, will not take up of space. - Made of safe and practical material, children can use it with peace of mind. - Let the children have fun functions such as gifts, toys, crafts and collectibles in addition to learning purposes. Package list: 20 x Erasers