DaLin Ultra Bright Colorful Floral Glow In The Dark Luminous Fluorescent PVC Wall Stickers, Small, Sheet Size 1020cm Brand New & High quality. Sheet size 10cm*20cm. To get good effect, two or more packs are suggested. Material:PVC. Note: It needs to absorb light, then it can glow. Great decoration for bedrooms, nursery rooms, kid's room,etc. It is the best way to install them where is a light. When the light is on, it absorb light. Then the light is off, it will glow.