Buy Flat Rate Postage Online -

To use flat rate services, you use the carrier's specific flat rate packaging.

: For USPS Priority Mail Flat Rate, you can ship up to 70 lbs domestically. buy flat rate postage online

: You can order flat rate boxes and envelopes for free from the USPS Postal Store . They are typically delivered to your door in packs of 10 or 25 within a few business days. To use flat rate services, you use the