New Paper Glows 2 Pack (20 sheets) Size;7X7cm(2.8X2.8 inches) Glow in Dark Origami Crane Heart Craft Paper set 18 Size : 7X7cm(2.8X2.8 inches) Color: One pack one color,glow in dark, you have to charge it under sunshine or fluorescence lamp before you put it in dark to see glow. this powder is "charged" with any source of light (sunlight works great) and will glow for 2-24 hours afterwards, depending on the color and charge time. Quantity:~10 sheets per pack,2 packs and 2 color total for biding price. Delivery time: By Airmail: Generally, delivery to USA takes about 10-35 days. Delivery to Canada,AU, UK, and other European countries takes about 14-28 days.