These extruded Dixon Lumber Crayons last up to 10 times longer than ordinary molded wax crayons. They are fade-proof, water-proof, smear-proof and won't melt in direct sunlight. They will work on wet (green) lumber or dry wood, metal, concrete and most other surfaces. Each hex-shaped crayon measures 4.5 inches long x 1/2-inch wide to fit lumber crayon holders. Dixon Lumber Crayons come in a 12-count box for use in warehouses, offices, construction sites, lumber yards and many other places. With a rich heritage, and origins dating back to 1795, the Dixon Ticonderoga Company throughout history have made our mark through quality, integrity, respect and perseverance. Today the Dixon Ticonderoga continues to make our mark manufacturing and marketing writing instruments, art supplies and tools for self expression, making each of our products "The Best of its Kind".