LOTO Tag sheets are made of 7.5 mil thick polyester. These are waterproof, tear-proof, weather-resistant sheets that are compatible with most laser printers. Apart from being printable, these polyester sheets have a writable surface that accepts writing from a pen, marker, or pencil. Each sheet has six LOTO tags separated by micro-perforation. The sheet measures 11 inches x 8.5 inches.