If you use PayPal Shipping, USPS Click N Ship, or Stamps.com, these are the labels for shipping packages, poly-bags, or large envelopes. It's 2- 8 x 5-1/2 labels per page. You can print one at a time, or both by reloading the label back in your printer OR gently tear page in half. Hope this helps explain what they are and how to use. THANX for stop'n in :D