Printed with inch scales. Easy storage in backpacks, briefcases & pencil cases. Fits 3-ring binders. Punches 1/4 in holes. Unconditional Guarantee: If for any reason you are not completely satisfied by your purchase, simply return the product with proof of purchase for a replacement or refund, whichever you prefer. We welcome any comments or questions you may have. When writing, please include the 12-digit UPC number.