They call it 1x1 and it comprises of 1 inch by 1 inch stickers of 36 colors(including black and white) that you can use to create wonderful pixel art in glass, walls and they say even in folders. They are actually pretty cheap in a sense as every box contains 400 1 by 1 stickers of every color(36 colors) and 800 for black. Its actually pretty generous for something this cheap.
Some Of Their Examples
Item Detail = 1X1 Pixel Art Stickers - $30.00 in Kickstarter