December 3, 2018 1 Comment FREE USPS Priority Mail Boxes and Supplies The USPS has Priority and Express Mail boxes, envelopes, and labels available for FREE with FREE shipping. FREE USPS Priority Mail Boxes and Supplies Facebook Twitter One Response Rob December 3, 2018 USPS flat rate boxes are always free. Add Comment Notify me of follow-up comments by email. Notify me of new posts by email.
USPS flat rate boxes are always free.