?Diameter: 11.8 inch. ?Color: Green (luminous green in the dark). ?Peel off the back, the moon is self-adhesive. ?Made of waterproof PVC, harmless to our body. ?Stick it to the surface that is dry, clean, smooth and dust free. ?Position it in the area that gets sufficient exposure to light during day time. ?The unique powder of the magic moon absorbs power from the light (sunshine or led) and then release in the darkness. The brightness that moon glows course depends on the light power it absorb. ?Suitable for any clean smooth wall, tiles, windows, metal, closet, plastic. ?Instructions ?On D Wall Glow In The Dark Moon stores light from another source, and then shines that back to you as a glow when the lights are shut off. It must be charged prior to application, by exposing it either to indoor or outdoor light. ?1. Keep the sticker under the indoor/outdoor (sunlight) for at least an hour. ?2. Peel and stick it on a dry and clean surface (flat surface is recommended). ?3. Position it in an area that receives sufficient exposure to light during day time. ?Take action and Get an 'On D Wall' Full Moon today for yourself or a loved one! Have a happy Halloween!