The size of the sticker is 15*5cm. Compared with plastics glow stars, our PVC glow stickers absorb light energy faster and brighter. Kids love this magical bedroom wall decals. Glow in the dark wall stickers take 10-30 minutes for charging in bright light. The glow will be brightest right after charging and fades over slowly, may last up to 8 hours. The ceiling stickers is waterproof and moisture-proof, strong self-adhesive but wall damage-free. It is light yellow in daytime, and glows green light in the dark.