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USPS Shipping Cost for Small Flat Rate Box in 2024

Shipping costs can add up quickly, especially when you’re running a small business or sending care packages to loved ones. If you’ve ever wondered exactly how much it costs to ship a USPS Small Flat Rate Box, you’re not alone. Knowing these fees helps you budget smarter and avoid surprises at checkout.

In this article, we’ll break down the current cost of shipping a USPS Small Flat Rate Box, explain what determines the price, and offer tips to save money on your shipments.

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How Much Does USPS Shipping Cost for a Small Flat Rate Box?

USPS offers a range of flat rate shipping boxes, making it easy to send items across the country without worrying about weight (within limits) or distance. The Priority Mail Flat Rate Small Box is one of the most affordable and convenient options for sending small items.

So, what does it cost to ship a Small Flat Rate Box with USPS? As of 2024, shipping a USPS Priority Mail Small Flat Rate Box costs $10.40 at the Post Office and $9.05 if you purchase your postage online using Click-N-Ship or through an approved shipping provider. This is a flat cost nationwide—you pay the same price whether you’re sending something across town or across the country.


Understanding the Small Flat Rate Box

What Is a Small Flat Rate Box?

A USPS Small Flat Rate Box is designed for shipping compact, dense items. As the name suggests, you pay a single rate no matter the destination within the United States, up to a certain weight limit.

  • Dimensions: Approximately 8 5/8″ x 5 3/8″ x 1 5/8″ (about the size of a thick paperback book).
  • Maximum Weight: 70 pounds. (Yes, you can ship up to 70 pounds at this flat price!)
  • Service: Available through Priority Mail, which typically delivers in 1-3 business days.

What Fits Inside a Small Flat Rate Box?


Complete Guide to USPS Flat Rate Boxes: Sizes, Costs, and Tips - usps shipping cost small flat rate box

Though labeled “small,” these boxes can hold quite a bit if packed efficiently. Ideal contents include:

  • Jewelry or watches
  • Small electronics (like cell phones)
  • Compact parts or tools
  • Gift cards and collectibles
  • Small apparel or accessories

Key Benefits of Using the Small Flat Rate Box

There are several reasons shippers choose this option for their packages:

1. Simplicity


USPS Flat Rate Boxes - What you need to know - Online Shipping Calculator - usps shipping cost small flat rate box

  • No need to weigh your package, as long as it’s under 70 pounds.
  • No worrying about zones or distance—the cost is always the same in the U.S.

2. Speed

  • Priority Mail service usually arrives within 1-3 business days.
  • Saturday delivery is included at no additional cost.

3. Free Packaging

  • USPS provides the boxes free of charge—you just have to pick them up at any post office or order online.

4. Tracking & Insurance

  • All Priority Mail shipments include USPS tracking.
  • Packages are automatically insured up to $100 when you pay retail rates or use online postage.

How to Ship With a Small Flat Rate Box: Step-by-Step


Find Your Fit: USPS Flat Rate Box Dimensions (2025) - usps shipping cost small flat rate box

  1. Pick Up or Order a Box
  2. Visit your local post office or order small flat rate boxes online (delivered free to your door).
  3. Pack Your Items
  4. Pack securely, ensuring items fit snugly and the box closes flat according to USPS guidelines.
  5. Seal the Box
  6. Use strong packing tape on all seams, following USPS regulations.
  7. Label Your Package
  8. Clearly address the box and affix a shipping label.
  9. Pay for Postage
  10. Buy postage at the Post Office or online (for discounted rates).
  11. Drop Off or Schedule Pickup
  12. Take your box to a Post Office, or schedule a free home pickup.

Cost-Saving Tips and Shipping Advice

If you want to get the most value when using small flat rate boxes, consider the following:

Buy Postage Online

  • Discounted Rates: USPS offers a lower price if you purchase and print your shipping label online.
  • Convenience: Saves you time in line at the post office.

Maximize the Box

  • Pack items tightly to use all available space.
  • Remember, the 70-pound weight limit is very generous—don’t be afraid to add heavier items (as long as the box can close flat).

Consider Insurance


Parcel Size, Weight & Fee Standards - USPS - usps shipping cost small flat rate box

  • While $100 is included, you can add more insurance if shipping valuable items.

Compare Rates if Shipping Is Local or Light

  • Flat rate isn’t always cheaper for light or short-distance packages.
  • For items under one pound, First-Class Package Service may offer a lower price, especially for nearby destinations.

International Flat Rate

  • USPS also offers international flat rate small boxes, but prices are higher, and different size and customs requirements apply.

Challenges and Considerations

Though straightforward, there are a few things to keep in mind:

  • Box Size Limitations: The small box can’t hold bulky or oddly-shaped items.
  • Overpacking: The box must close securely with all flaps flat—overstuffing can delay shipment or result in extra fees.
  • Domestic-Only for Listed Price: The $10.40 (or $9.05 online) rate applies only to domestic shipments (including military FPO/APO). International rates are higher.


Priority Mail | USPS - usps shipping cost small flat rate box


Practical Examples: Is the Small Flat Rate Box Right for You?

Let’s look at a few common use-cases:

  • E-commerce sellers: Perfect for shipping small electronics, jewelry, or collectibles to buyers.
  • Gift Senders: Efficient for students, family, or friends receiving care packages.
  • Business Owners: A straightforward way to calculate shipping costs—cost predictability simplifies budgeting.

Best Practices to Ensure Smooth Shipping

Follow these tips for hassle-free shipping:

  • Use interior cushioning (bubble wrap, tissue, or foam) to protect breakables.
  • Avoid taping or altering the flat rate box—USPS may void the flat rate if you change the box shape.
  • Always attach the correct label (Priority Mail Flat Rate Small Box).
  • Double-check the address for accuracy.

Summary

The USPS Priority Mail Small Flat Rate Box offers an easy, cost-effective way to ship small items anywhere in the U.S. for a single flat rate. With free boxes, included tracking, and quick delivery, it’s a great choice when your items fit the size constraints. For shippers who value convenience and fixed rates, this option is hard to beat.



Priority Mail Flat Rate® Small Box | USPS.com - usps shipping cost small flat rate box

Frequently Asked Questions (FAQs)

1. What is the current cost to ship a USPS Small Flat Rate Box?
As of 2024, shipping a Priority Mail Small Flat Rate Box costs $10.40 when purchased at the Post Office and $9.05 through online postage services.

2. How much can I put in a small flat rate box?
You can ship up to 70 pounds, as long as the box closes flat and isn’t altered. Remember, the box’s internal volume is limited by its dimensions, so only compact, dense items are realistic.

3. Is insurance included with small flat rate box shipments?
Yes. USPS includes up to $100 of insurance for domestic Priority Mail shipments, including flat rate boxes. You can purchase extra insurance if needed.

4. Can I use custom packing tape on a USPS flat rate box?
You should use strong, plain packing tape. Avoid covering the entire box in tape or using tape to alter the box shape—doing so may void flat rate eligibility.

5. How do I get USPS small flat rate boxes?
You can pick them up for free at any post office or order them (also free) online at the USPS website. Boxes are usually shipped to your home or business at no charge.


If you send small items frequently, USPS Priority Mail Small Flat Rate Boxes provide a hassle-free, predictable, and reliable shipping solution from coast to coast.

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