Weight restrictions for domestic Priority Mail Express Flat Rate Envelopes, and Priority Mail Flat Rate Envelopes and Boxes are 70 pounds. Tape may be applied to the flaps and seams to reinforce the container provided the design of the container is not enlarged by opening the sides and the container is not reconstructed in any way. When sealing a Flat Rate Box or Flat Rate Envelope, the container flaps must be able to close within the normal folds.

Note: Flat Rate prices are available when material is sent in a USPS -produced Flat Rate Envelope or Box. USPS Marketing Mail Eligibility Decision TreeĪvailable for Domestic and International PRIORITY MAIL EXPRESS Flat Rate Envelopeġ2-1/2' x 9-1/2' Legal Flat Rate Envelopeġ2-1/2' x 9-1/2' Gift Card Flat Rate EnvelopeĨ-11/16' x 5-7/16' x 1-3/4' – Outside Medium Flat Rate Boxesġ4' x 12' x 3-1/2' – Outside Large Flat Rate Boxġ2-1/4' x 12-1/4' x 6' – Outside Large Video Box (Flat Rate pricing for international only)ĩ-9/16' x 6-7/16' x 2-3/16' – Outside DVD Box (Flat Rate pricing for international only).Designing Letter and Reply Mail (PUB 25).It will show you a precise estimate, regardless of the size of the box. The small box is among the most affordable options, so use a USPS Shipping Calculator to find out the details. As long as you know your box size, you’ll always know the exact postage rate. The best part of it all is that it’s predictable. USPS flat rate shipping provides a fast and cost-effective shipping service. If you need to ship something close to that kind of weight, USPS Flat Rate Boxes Large will probably be the more suitable choice. Your mailman, on the other hand, will probably be shocked. In fact, if you managed to jam 70 lbs worth of things inside a USPS small box, we’d be amazed. The weight limit for USPS flat rate shipping is 70 lbs per package, so we don’t foresee you having any problems in that regard. This might not seem like much, but it’s enough for mail such as small electronic devices and medium-sized books. In inches, this would be precisely 8 5/8″ x 5 3/8″ x 1 5/8″.

The inside opening of a USPS small box is the size of three DVD cases on top of each other. This article will concentrate on the most affordable option: the small flat rate box.

USPS Flat Rate Boxes offer just that: each one of the boxes has a pre-set price, regardless of what you put inside. If you frequently send or receive small packages, a flat-rate delivery service might come in handy.

How big is a usps small flat rate box