
Shipping labels play a crucial role in ensuring packages reach their intended destinations. Whether you’re an e-commerce seller, a small business owner, or just someone mailing a package, you’ve probably wondered: does shipping label have to be flat?
The short answer is yes, shipping labels should be as flat as possible. However, there are some nuances to consider when affixing labels to irregular or curved surfaces. In this post, we’ll explore does shipping label have to be flat, why flat labels matter, what happens when labels are wrinkled or curved, and best practices for applying shipping labels correctly.
Why Does a Shipping Label Need to Be Flat?
Does shipping label have to be flat? A shipping label contains vital information such as the recipient’s address, return address, and barcode for tracking. Ensuring that the label is flat and legible is important for several reasons:
1. Accurate Scanning by Shipping Carriers
Most shipping carriers, including USPS, FedEx, UPS, and DHL, use automated scanners to read barcodes on shipping labels. If a label is wrinkled, curved, or creased, the barcode might become unreadable, leading to delivery delays or even package returns.
2. Preventing Misdeliveries
A distorted label could result in misreading of the address by human workers or automated systems. If part of the address is obscured, a package might end up in the wrong city or even another country. Keeping the label flat ensures all details are clear.
3. Avoiding Additional Fees or Delays
Some carriers may charge additional fees if a package requires manual intervention due to an unreadable label. In the worst-case scenario, the package could be returned to the sender, leading to wasted time and shipping costs.
4. Enhancing Professionalism
For businesses, a clean, well-applied label reflects professionalism. Customers trust companies that take care in their packaging. A crumpled or peeling label might leave a poor impression.
What Happens If a Shipping Label Is Not Flat?
If a label is placed on a curved or irregular surface, several issues can arise:
- Barcode Readability Issues: Scanners might fail to read a barcode that is distorted by folds or wrinkles.
- Ink Smudging or Peeling: If the label peels away from the surface, it may smudge or even detach completely.
- Delivery Delays: Unreadable labels require manual handling, which slows down processing times.
- Lost Packages: If a label falls off in transit, there’s a chance the package might never reach its destination.
How to Properly Apply a Shipping Label
Does shipping label have to be flat? Now that we understand the importance of keeping labels flat, let’s go over best practices for affixing a shipping label to a package:
1. Choose a Flat Surface
The best place for a shipping label is a flat, smooth area of the package. This allows the label to adhere fully without wrinkles or distortions.
2. Use the Right Label Size
Most carriers recommend standard label sizes, such as 4” x 6” or 8.5” x 11”. Using a label that is too large for your package increases the risk of it creasing when wrapped around the box.
3. Avoid Placing Labels on Seams or Edges
Labels should never be placed over box seams, edges, or curves. These areas are more likely to cause wrinkling or peeling. Instead, place the label on a large, smooth section of the package.
4. Use High-Quality Adhesive Labels
If you’re printing your own shipping labels, invest in self-adhesive labels rather than using paper and tape. Labels printed on regular paper and attached with tape can peel off, especially in humid conditions.
5. Apply the Label Smoothly and Securely
When placing the label, press it down firmly and smooth out any air bubbles. If using a thermal label printer, ensure the print is clear and doesn’t smudge.
6. Consider Label Pouches for Oddly Shaped Packages
For curved or irregular surfaces, such as mailing tubes or poly bags, use label pouches. These clear adhesive sleeves allow labels to be inserted flat while still sticking securely to the package.
7. Print High-Quality Labels
A blurry or low-resolution label can be just as problematic as a wrinkled one. Use a thermal printer or a high-quality inkjet/laser printer for clear, professional-looking labels.
What About Shipping Labels on Cylindrical or Soft Packages?
Not all packages are flat, and sometimes, you may need to ship items in mailing tubes, poly mailers, or padded envelopes. Here’s how to handle labels on these types of packaging:
- Mailing Tubes: Place the label lengthwise along the tube rather than wrapping it around. This keeps the barcode flat and scannable.
- Poly Mailers & Padded Envelopes: Apply the label before inserting items to avoid wrinkles. If the mailer is already filled, press it down on a hard surface before attaching the label.
- Irregularly Shaped Items: Consider placing the label inside a clear shipping pouch to keep it flat.
What If You Can’t Keep the Label Flat?
In some cases, a perfectly flat label might not be possible. If you must place a label on a curved surface, follow these steps to minimize issues:
- Use Extra Adhesive: Secure the edges with additional clear packing tape.
- Ensure the Barcode is Legible: The barcode should remain as flat as possible, even if other parts of the label curve slightly.
- Request a Carrier Pouch: Some shipping carriers offer plastic pouches to hold labels, making them easier to attach securely.
Conclusion
So, does shipping label have to be flat? Yes, ideally. A flat label ensures accurate scanning, prevents delivery issues, and maintains a professional appearance. While some irregular packaging requires special handling, applying labels carefully and securely can help avoid common shipping pitfalls.
By following best practices, you can ensure your packages reach their destinations smoothly—without delays, extra fees, or lost shipments. Whether you’re shipping for business or personal use, taking a few extra moments to properly apply a shipping label can make all the difference.

Hello, I am an E-commerce Expert with extensive experience providing services to numerous e-commerce brands and individuals since 2017. My primary areas of expertise include the Amazon, Walmart, and Shopify marketplaces. Linkedin