Ever stared at a pile of items and wondered just how much it’ll cost to send them across the country? USPS’s “If It Fits, It Ships” promise has tempted many with its simplicity, but the actual prices can be confusing.
Knowing exactly what you’ll pay can help you budget, avoid surprises, and ship smarter. This article breaks down the current rates, explains how it works, and shares tips to help you make the most of USPS flat-rate shipping.
Related Video
Understanding USPS “If It Fits, It Ships” Pricing
USPS “If It Fits, It Ships” is a simple and popular way to send packages through the U.S. Postal Service. The program uses specially-sized boxes and envelopes with flat-rate prices — meaning you pay one price, regardless of how much your package weighs or where it’s going in the U.S., as long as it fits and closes properly. This can save money, simplify shipping, and help both individuals and businesses plan their postage costs with confidence.
Let’s dive into how Flat Rate shipping works, what the prices and sizes are, and tips to help you get the most value.
How Does USPS Flat Rate Shipping Work?
Flat Rate shipping is part of USPS Priority Mail. The concept is clear:
- You pick a USPS Flat Rate box or envelope (available free at post offices and online).
- Fill it up with whatever you need to send—up to the maximum allowed weight.
- As long as the item fits and the package closes securely, you pay a single, fixed price.
- Shipping is charged at a flat rate, regardless of delivery distance within the U.S.
This takes the guesswork out of shipping, especially when mailing heavier items across the country.
Types of USPS Flat Rate Packages
USPS offers a range of Flat Rate boxes and envelopes to suit different needs. Here are the most common options:
1. Flat Rate Envelopes
- Flat Rate Envelope: Good for documents and thin items.
- Legal Flat Rate Envelope: Slightly longer, fits legal-size papers.
- Padded Flat Rate Envelope: Padded for extra protection.
2. Flat Rate Boxes
- Small Flat Rate Box: Best for jewelry, small electronics, or parts.
- Medium Flat Rate Box: Comes in two shapes — side-loading (“top loading”) and front loading (“side loading”), both with similar internal dimensions.
-
Large Flat Rate Box: Largest standard option, suitable for bulkier items.
-
APO/FPO Large Flat Rate Box: Specially discounted for military addresses overseas.
Current USPS Flat Rate Prices (Estimates for 2024)
- Note: Actual rates may change, so check latest official USPS information for precise pricing.*
Here’s a quick list of common Flat Rate package options and their approximate costs:
| Package Type | Size (L x W x H) | Max Weight | Approx. Price (Domestic) |
|---|---|---|---|
| Flat Rate Envelope | 12.5″ x 9.5″ | 70 lbs | $9.65 |
| Legal Flat Rate Envelope | 15″ x 9.5″ | 70 lbs | $9.95 |
| Padded Flat Rate Envelope | 12.5″ x 9.5″ | 70 lbs | $10.40 |
| Small Flat Rate Box | 8.6875″ x 5.4375″ x 1.75″ | 70 lbs | $10.20 |
| Medium Flat Rate Box 1 | 11.25″ x 8.75″ x 6″ | 70 lbs | $17.10 |
| Medium Flat Rate Box 2 | 13.625″ x 11.875″ x 3.375″ | 70 lbs | $17.10 |
| Large Flat Rate Box | 12.25″ x 12.25″ x 6″ | 70 lbs | $22.80 |
| APO/FPO Large Box | 12.25″ x 12.25″ x 6″ | 70 lbs | $21.40 |
Important Details:
- Prices reflect domestic shipping. International rates differ.
- All Flat Rate items have a 70 lb maximum weight, except the Small Flat Rate Box (also 70 lbs, but limited by space).
- Pick up the boxes and envelopes for free at local USPS offices or online.
- Postage must be purchased at the time of mailing.
Key Benefits of USPS If It Fits, It Ships
Why choose USPS Flat Rate shipping? Here are the standout advantages:
- Predictable Pricing: The price doesn’t change based on distance or weight (up to 70 lbs).
- Speed: Delivers typically in 1-3 business days nationwide.
- Free Tracking and Insurance: Includes tracking and up to $100 insurance for most shipments.
- Free Supplies: Flat Rate boxes and envelopes are provided at no cost.
- No Zone Calculation Needed: No need to calculate “zones” or distances.
- Convenient Drop-Off: Easy to mail from your home, business, or any USPS location.
When Is Flat Rate Shipping the Best Choice?
Flat Rate shipping is a great option if:
- Your package is relatively heavy for its size (close to 70 lbs). The heavier your item, the more you could save.
- You’re shipping cross-country—distance doesn’t affect the cost.
- You want a fast, simple way to know your shipping cost up front.
However, for lightweight or short-distance parcels, regular Priority Mail (which charges by weight and distance) could be cheaper.
Step-by-Step: How to Use USPS Flat Rate Shipping
- Pick the Right Box or Envelope
- Select a Flat Rate box or envelope that fits your item securely.
- Pack Securely
- Ensure the box closes properly without bulging or altering its shape.
- Use padding for fragile items, especially in envelopes.
- Prepare the Mail
- Affix labels and fill out customs forms if shipping internationally.
- Add your return address.
- Pay for Postage
- Purchase postage online or at the post office.
- Printing online may sometimes provide a slight discount.
- Mail Your Package
- Drop it off at any USPS location, blue collection box (if it fits), or schedule a pickup.
Practical Tips and Best Practices
- Compare Costs: Use the USPS price calculator to see if flat rate or regular Priority Mail offers the better deal for your specific item.
- Weight Matters Less: The closer your shipment is to the 70 lb limit, the more value you get from Flat Rate shipping.
- Size Limits Matter: The item must fit inside the box and allow it to close in its original shape.
- International Flat Rate: Flat Rate is available for select international destinations, but with different prices and rules (often lower weight limits).
- Business Discount Programs: Regular shippers may be eligible for commercial pricing or online postage discounts.
- Secure Fragile Items: For breakables, use internal cushioning as USPS Flat Rate boxes are sturdy but not padded.
- Track and Insure: Retain your tracking number until delivery; flat rate includes insurance, but consider extra coverage for valuable items.
- Reuse for Returns: Many e-commerce businesses use Flat Rate for customer returns due to predictable cost and free supplies.
Cost Tips for Flat Rate Shipping
- Use Flat Rate for Heavy, Small Packages: Shipping books, tools, electronics, and dense items is often cheapest using Flat Rate.
- Short Distance, Light Packages: If sending something small and light locally, regular Priority Mail may cost less than Flat Rate.
- Order Free Supplies: Don’t pay for extra boxes—order Flat Rate supplies for free from USPS.
- Bulk Shipments: For multiple items, see if combining into a larger Flat Rate box lowers your total shipping cost.
Common Challenges or Limitations
While Flat Rate shipping simplifies things, be aware of these issues:
- Volume Limits: If your item doesn’t fit, you must use a larger and potentially more costly box.
- International Restrictions: Not all countries accept Flat Rate packages; limits may apply.
- Package Security: Flat Rate boxes aren’t reinforced. Extra padding may be needed for fragile goods.
- Dimensional Weight Oversight: For unusually large, lightweight items, Flat Rate might not be a bargain.
- Prohibited/Restricted Items: Certain goods (liquids, perishables, hazmat) still have restrictions regardless of package type.
Conclusion
USPS “If It Fits, It Ships” Flat Rate options offer a clear, predictable way to manage shipping costs. They’re perfect for heavy or long-distance packages, small business shipping, or simplifying your mailroom. By choosing the right box or envelope, comparing available mailing options, and packing securely, you’ll save time and money—and avoid surprises at the counter.
Frequently Asked Questions (FAQs)
What happens if my item doesn’t fit in a Flat Rate box or envelope?
If your item doesn’t fit or the box/envelope cannot close correctly, you’ll need to use a different size or switch to regular Priority Mail, which may cost more or less depending on weight and distance.
Is there a weight limit for USPS Flat Rate shipping?
Yes. The maximum weight for any domestic USPS Flat Rate package is 70 lbs. For international Flat Rate, weight limits are lower, usually 4 lbs for envelopes and 20 lbs for boxes.
Are there extra fees for rural or remote areas?
No. The Flat Rate covers delivery anywhere in the U.S., including Alaska, Hawaii, Puerto Rico, and APO/FPO addresses, at no additional charge.
Can I use any box for Flat Rate, or does it have to be USPS branded?
You must use official USPS Flat Rate boxes or envelopes for Flat Rate pricing to apply. Regular boxes, even if the same size, do not qualify.
Does Flat Rate shipping include tracking and insurance?
Yes. All Flat Rate packages come with USPS tracking and up to $100 in insurance for domestic shipments. Additional insurance is available for a fee. Always save your receipt and tracking number until delivery is confirmed.
Using USPS Flat Rate shipping is an excellent way to keep costs predictable, especially for heavy or distant deliveries. With a little planning, you can make the most of this trusted shipping option.
