ufengke&reg; 10-pcs Unicorn Wall Decals Fluorescence Stickers Glow in The Dark, Living Room Bedroom Removable Wall Stickers Murals Applies to any clean/dry/flat surface Easy to apply, remove and reuse without leaving damage or residue Comes in 1 sheet, sheet size: 21cm x 28cm(8.3" x 11.0") set of 10 pcs, each size: 7cm x 10cm It needs to absorb enough light to glow in the dark