The USPS has exacting rules on what qualifies as a letter, a flat or a package. Getting it wrong runs the risk of having your mail returned for insufficent postage -- or, just as bad, overspending on pastage. Skip the guesswork and use our Mail Shape Template! Make sure your mailroom is using the right class every time!

• Our color-coded design makes determining mail types easier than ever
• Thickness slots help you determine if your mailpiece is a letter, flat or package
• Guide can also be used as a ruler - accurate to 1/8"
• Guide can be used to determine USPS First-Class retail rates only