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Fame Shock News

priority mail boxes sizes

Author

Olivia Hensley

Updated on August 17, 2026

The United States Postal Service offers Priority Mail flat rate shipping in three box sizes: Small: 8 ⅝” x 5 ⅜” x 1 ⅝” Medium: 13 ⅝” x 11 ⅞” x 11” or 11” x 8 ½” x 5 ½” Large: 23 11/16” x 11 ¾” x 12” or 12” 12” x 5 ½”

Is it cheaper to use your own box for priority mail?

Otherwise, Priority Mail® is just the name of the service class, and you can use any box or packaging that you’d like and for most cases, it’s actually cheaper to use your own packaging instead of a Flat Rate service. Use our postage rate calculator to find your most cost effective options.

What are the sizes of Priority Flat Rate boxes?

Available in two sizes: 11 inches x 8½ inches x 5½ inches (top-loading) – Perfect for model cars, shoes, and taller items. 13⅝ inches x 11⅞ inches x 3⅜ inches (side-loading) – Ideal for garments, board games, books, and other relatively thin items.

What are the box sizes at USPS?

The Actual Outer Dimensions of Each Free USPS Box
Priority Mail Box 1092 – 13.625 x 12.25 x 2.813″Priority Mail Box 1095 – 15.5 x 12.5 x 3.125″Priority Mail Box 1096L – 9.375 x 6.375 x 2.188″Priority Mail Box 1097 – 13.188 x 11.625 x 2.5″Priority Mail Box 4 – 7.25 x 7.25 x 6.25″Priority Mail Box 7 –

Is it cheaper to use a flat rate box or your own box USPS?

While Medium and Large Flat Rate boxes may be free, using your own packaging is often CHEAPER than shipping Priority Mail Flat rate, thanks to a “secret” USPS mail class called Priority Mail Cubic.

Is Priority Mail by weight or size?

Except for Priority Mail Flat Rate packaging, Priority Mail prices are based on weight and zone.

Can you use a brown box for priority mail?

Yes, so long as you’re not shipping via Flat Rate. If you’re shipping Priority Mail Commercial from home, you can use any box you want. Just be sure to remove any old postal barcodes or labels. By using PitneyShip, you can easily weigh and measure your package and print the appropriate Priority Mail postage.

What is the cheapest way to send a package USPS?

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 $0.58 at a Post Office.

What is the cheapest way to send a package?

USPS will always be the cheapest way to ship compared to FedEx or UPS hands down. However as the weight creeps closer to 2 pounds, USPS shipping costs achieve pricing parity with UPS and FedEx Ground.

Can I use a flat rate box but pay by weight?

“If [a Flat Rate Envelope] or [Flat Rate Box] is presented at the office of mailing and the customer has manipulated or reconstructed it, the container is accepted using weight and zone — not the Flat Rate price.”

How do I calculate shipping costs USPS?

How to Use the USPS Shipping Calculator
Navigate to the USPS Postage Price Calculator page. Enter the details of your letter or package. Select the shipment type. Compare shipping options. Add Extra Services. Hit “Continue” for your result. Pay for shipping and print postage for your shipment.

Are USPS Priority boxes free?

The USPS provides free shipping boxes and envelopes for Priority Mail and Global Express Guaranteed packages.

Are flat rate boxes cheaper?

One possible way to reduce shipping costs is with USPS flat rate shipping. With flat rate shipping, the weight of a package does not affect the cost of shipping. If you ship heavy items, then this will save you money. On the flip side, flat rate shipping can be more expensive if your packages are lightweight.

Can I use my own box for USPS?

USPS offers flexible services, like package pick-up and yes, use-your-own box shipping for pretty much all of their mail classes, including International shipping.

Is it cheaper to send 2 boxes or 1 big box?

If possible, it’s often better to ship two smaller boxes rather than one large, heavy box. This will spread the weight of your cargo over two smaller parcels, which can significantly reduce your shipping costs especially if the large box would qualify for large or oversized pricing.

Can I use duct tape on a flat rate box?

It’s simple: duct tape simply doesn’t provide a sufficiently strong seal. It doesn’t adhere well to the cardboard material most packages use and has a tendency to “unstick”.

Are priority boxes free at Post Office?

The USPS provides free shipping boxes and envelopes for Priority Mail and Global Express Guaranteed packages.

Can you use your own box for USPS Priority mail?

Can I use my own box for Priority shipping? Yes, so long as you’re not shipping via Flat Rate. If you’re shipping Priority Mail Commercial from home, you can use any box you want. Just be sure to remove any old postal barcodes or labels.

What size is Priority mail box 4?

Priority Mail Box – 1095 | 15-1/4″ x 12-3/8″ x 3″ | Cubic Tier 4. Priority Mail Box – Shoe Box | 7-1/2″ x 5-1/8″ x 14-3/8″ | Cubic Tier 4.

Are flat rate boxes free at the Post Office?

Advantages of Flat Rate Shipping

USPS flat rate boxes are free. Merchants can simply order them at no cost and start shipping. Merchants will still need to purchase packing peanuts or similar cushioning material, but not having to pay as much as $1 per box can be huge savings.