United States Postal Service
The USPS offers "Flat Rate Envelope - Pack of 10 - Free
At the online Postal Store (http://shop. Usps.com/), the USPS offers "Flat Rate Envelope - Pack of 10 - Free". There is no other information available about this offer other than a tiny picture of the envelopes. When one clicks on the Order button, the 10-pack is added to your shopping ...