USPS Small Flat Rate Box: Size, Cost & How To Use

Nick Leason

-Oct 4, 2025

USPS Small Flat Rate Box: Size, Cost & How To Use

The USPS Small Flat Rate Box is a convenient and affordable option for shipping small packages. It offers a fixed price regardless of weight or destination within the United States, making it a popular choice for individuals and businesses alike. This guide covers everything you need to know about the USPS Small Flat Rate Box, including its dimensions, pricing, how to use it, and its advantages.

Key Takeaways

USPS Small Flat Rate Boxes offer a fixed price for shipping items up to 70 pounds within the US.
The interior dimensions are 8 11/16" x 5 7/16" x 1 ¾", making them ideal for small items.
You can order free Small Flat Rate Boxes online from the USPS or pick them up at your local post office.
Using Small Flat Rate Boxes can save time and money on shipping, especially for heavier items.
Ensure your items fit securely within the box and that the box can be closed properly to avoid shipping issues.

Introduction

The United States Postal Service (USPS) offers a variety of shipping options, and the Small Flat Rate Box is one of the most popular for its simplicity and cost-effectiveness. This guide provides a comprehensive overview of this shipping option, detailing its features, benefits, and how to use it effectively. Whether you're a frequent shipper or just sending a package occasionally, understanding the Small Flat Rate Box can help you save time and money.

What & Why

The USPS Small Flat Rate Box is a specific type of packaging offered by the USPS that allows you to ship items for a fixed price, regardless of their weight (up to 70 pounds) or destination within the United States. The primary benefit is the cost savings, especially for heavier items that would otherwise incur higher shipping charges based on weight and distance. — Rochester NY Weather Radar: Track Storms

What is it? The Small Flat Rate Box is a cardboard box with interior dimensions of 8 11/16" x 5 7/16" x 1 ¾". It's designed for small, dense items that can fit comfortably inside. The fixed price includes USPS tracking and insurance up to $50.

Why use it?

Cost Savings: The flat rate pricing can be significantly cheaper than paying for shipping based on weight and distance, especially for heavier items.
Convenience: The fixed price simplifies budgeting for shipping costs.
Free Boxes: USPS provides the boxes for free, which can be ordered online or picked up at your local post office.
Speed and Reliability: Flat Rate Boxes are shipped using USPS's reliable network, with delivery times typically ranging from 1-3 business days.

Potential Risks

Size Limitations: The box's small size may not accommodate all items. If your item doesn't fit, you'll need to use a different shipping option.
Not Always the Cheapest: For very lightweight items, other USPS services like First Class Package Service might be more affordable.

How to Use the USPS Small Flat Rate Box

Using the USPS Small Flat Rate Box is straightforward. Here’s a step-by-step guide:

Obtain a Box:
- You can order free Small Flat Rate Boxes online from the USPS website.
- You can also pick them up at your local post office.
Prepare Your Item:
- Ensure your item fits comfortably inside the box without bulging or distorting the box's shape.
- Use appropriate packing materials (bubble wrap, packing peanuts, etc.) to protect fragile items.
Pack the Box:
- Place your item inside the box, ensuring it is secure and won't shift during transit.
- Fill any empty space with packing material to prevent movement.
Seal the Box:
- Use packing tape to securely seal all seams and flaps of the box.
- Ensure the box is sealed tightly to prevent items from falling out during shipping.
Address the Package:
- Clearly write or print the recipient's address in the center of the box.
- Include your return address in the upper left corner.
Purchase Postage:
- You can purchase postage online through the USPS website or at a post office.
- If purchasing online, you can print the shipping label and affix it to the box.
Ship the Package:
- Drop off the package at a post office.
- Schedule a free package pickup online.
- Drop it in a USPS blue collection box (for packages with prepaid postage).

Examples & Use Cases

The USPS Small Flat Rate Box is ideal for a variety of items. Here are some common examples and use cases: — Los Angeles Weather In January: What To Expect

Small Electronics: Shipping smartphones, cameras, or other small electronic devices.
Books and Media: Sending books, DVDs, or video games.
Jewelry and Accessories: Mailing jewelry, watches, or other small accessories.
Small Parts and Components: Shipping small machine parts, electronic components, or hardware.
Promotional Materials: Sending brochures, flyers, or other marketing materials.
Gifts: Mailing small gifts to friends and family.
Samples: Shipping product samples to customers or clients.

Use Case Scenarios:

E-commerce Business: A small business selling jewelry online can use Small Flat Rate Boxes to ship products to customers at a predictable cost.
Individual Sending a Gift: An individual sending a birthday gift to a friend can use a Small Flat Rate Box to save on shipping costs.
Company Shipping Samples: A company can use Small Flat Rate Boxes to send product samples to potential clients in a cost-effective manner.

Best Practices & Common Mistakes

To ensure a smooth shipping experience with USPS Small Flat Rate Boxes, follow these best practices and avoid common mistakes:

Best Practices:

Use Proper Packing Material: Protect your items with bubble wrap, packing peanuts, or other cushioning materials.
Seal the Box Securely: Use strong packing tape to seal all seams and flaps of the box.
Address the Package Clearly: Write or print the addresses clearly and legibly.
Purchase Postage Online: Save time by purchasing postage online and printing your own shipping labels.
Schedule a Pickup: Take advantage of free package pickup services to avoid trips to the post office.

Common Mistakes:

Overfilling the Box: Overfilling the box can cause it to bulge and may result in damage or additional fees.
Using the Wrong Box: Ensure you are using an official USPS Small Flat Rate Box to qualify for flat rate pricing.
Not Securing Items Properly: Items that are not properly secured can shift during transit and become damaged.
Incorrectly Addressing the Package: Incorrect or illegible addresses can cause delays or misdeliveries.
Underestimating Weight: While the flat rate covers up to 70 pounds, ensure you accurately estimate the weight to avoid issues.

FAQs

1. What are the dimensions of the USPS Small Flat Rate Box? The interior dimensions are 8 11/16" x 5 7/16" x 1 ¾".

2. How much does it cost to ship a Small Flat Rate Box? The price varies slightly but is typically around $9.45. Check the USPS website for the most current pricing.

3. Where can I get Small Flat Rate Boxes? You can order them for free online from the USPS website or pick them up at your local post office.

4. Is there a weight limit for Small Flat Rate Boxes? Yes, the weight limit is 70 pounds.

5. Can I ship internationally using a Small Flat Rate Box? Yes, there are international Small Flat Rate Box options available. Pricing and delivery times vary by destination. — Seattle Weather In July: What To Expect

6. What if my item doesn't fit in the Small Flat Rate Box? You will need to use a different shipping option, such as a Medium or Large Flat Rate Box, or pay for shipping based on weight and distance.

Conclusion

The USPS Small Flat Rate Box is a versatile and cost-effective option for shipping small items. By understanding its dimensions, pricing, and best practices, you can save time and money on your shipping needs. Whether you're a business owner or an individual, the Small Flat Rate Box offers a convenient solution for a wide range of shipping requirements.

Ready to ship? Order your free Small Flat Rate Boxes from the USPS website today and experience the convenience of flat rate shipping!

Last updated: October 26, 2023, 16:35 UTC