Get Usps Box Sizes

Use a sturdy box with enough room to add cushioning for fragile items and to prevent items from shifting. If you're reusing a box, make sure all old logos, shipping labels, and addresses are covered or blacked out.

USPS Flat Rate Envelopes are almost ALWAYS the cheapest option. However, use your own envelope for packages weighing exactly 1 lb. and traveling locally. And if your package weighs less than 1 lb., use your own envelope and ship via USPS First-Class Package Service.

First-Class Mail® is an affordable mail service for standard-sized, single-piece envelopes weighing up to 3.5 oz and large envelopes and small packages weighing up to 13 oz. Prices start at $0.63 at a Post Office.

Is flat rate shipping cheaper? USPS flat rate shipping can be cheaper than other shipping methods because you can optimize what you fit in the flat rate box, but the major benefit is that it makes it easier to budget for shipping costs because you can predict the cost every time.

The length fee is a nonstandard fee charged when the parcel length is either 22 inches up to 30 inches or more than 30 inches. The cubic fee is a nonstandard fee charged when the parcel cubic volume is more than 2 cubic feet (3,456 cubic inches). These can be charged for: Priority Mail Express (Retail and Commercial)

What USPS Box Sizes Are Free? Small Flat Rate Box-8 5/8″ x 5 3/8″ x 1 5/8″ Medium Flat Rate Box – 1 (top-loading): 11″ x 8 1/2″ x 5 1/2″ Medium Flat Rate Box – 2 (side-loading): 13 5/8″ x 11 7/8″ x 3 3/8″ Large Flat Rate Box: 12″ x 12″ x 5 1/2″ Priority Mail Shoe Box: 7 1/2″ x 5 1/8″ x 14 3/8″

Flat Rate is convenient, since you don't need to worry about the size or weight of the box... but that convenience comes at a price. If your items weigh less than 20 lbs, Medium and Large Flat Rate Boxes can be much more expensive than using your own packaging and shipping with Priority Mail Cubic instead.