Material: Glow in the dark stars are made of high quality vinyl and luminous materials, beautiful and thick, non-toxic, waterproof. These stickers have a strong adhesive backing and are very easy to install, just peel and stick to install Size: 4 sizes of glow in the dark star stickers are included in this pack of glowing wall stars stickers for ceiling, satisfy your different needs of wall decoration creation. Star size: 0.4 cm /0.16 inch, 1 cm /0.39 inch, 1.5 cm /0.59 inch, 2.5 cm /0.98 inch Long-Lasting Glow: Put glowing star under the light source absorb it for 15-20 minutes, and then glowing in the dark.The longer time luminous stickers absorb sunlight or light at daytime, the perfecter the effect at night Shining Decoration: Abundant stars are shining on the wall to accompany your child at night. When seeing the starry sky within reach, your child will feel in a dreamlike world Wide Application: These glow in the dark wall stickers allow you to create various patterns, and star charts, and even spell out words and small animals. Enjoy quality parent-child time while decorating with these glow stickers, fostering creativity and learning