U.S. Postal Service on Twitter: "What's better than a box that ships for one flat rate? A *free box* that ships for one flat rate! 😉 Get free boxes online at https://t.co/JDQ4OcZZox
Mail & Shipping Services | USPS
What Priority Mail® Flat Rate Boxes Are Available?
Priority Mail Large Video Box 9 9/16" x 6 7/16" x 2 3/16" – Endicia Supplies Store