Dritz Quilting Chalk Cartridge Set The chalks are only 4-millimeter thick and come in every color you could possibly need for sewing, quilting, crafting, scrapbooking, and much more Featuring a 4-3/4 by 7/16-inch red/yellow plastic cartridge, a sharpener to keep your chalk line fine and a reUSAble plastic box with sixteen extra chalks Features eight white and eight assorted colors