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2 square mailer boxes lying flat on top of each other, the top one is open and filled with cookies. The boxes are multi-colored and branded.
A square mailer box filled with goodies from a travel agency.
3 square mailer boxes lying flat showing the brand name on the top lid of the box.
An open blue square mailer box with an all- white inside.
3 square mailer boxes two of which are lying flat and a third is standing on its end. The top flat box is open showing a message inside.
2 square mailer boxes lying flat on top of each other, the top one is open and filled with cookies. The boxes are multi-colored and branded.
A square mailer box filled with goodies from a travel agency.
3 square mailer boxes lying flat showing the brand name on the top lid of the box.
An open blue square mailer box with an all- white inside.
3 square mailer boxes two of which are lying flat and a third is standing on its end. The top flat box is open showing a message inside.
Example 6 of selected product

Square Mailer Boxes

Send your products in style with square mailer boxes. These cardboard boxes can be mailed without secondary packaging.
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Create a unique unboxing experience with square mailer boxes.

  • 2 size options
  • 1/8" white B-flute corrugated cardboard
  • Full interior & exterior printing
  • No minimum order
  • 100% recyclable

Square Mailer Box Samples: Want to see a pre-printed box in person, before you design and order your own?  Request a sample. Or view all of our packaging sample options here.

Shipping made simpler

Why use multiple types of packaging when you only need one? Our square mailer boxes are made from sturdy, white B-flute corrugated cardboard, so all you have to do is stick a shipping label on them and they’re ready to go. The internal fluting protects your goods by absorbing any bumps and thumps they may receive along the way.

Corner-to-corner printing

These won’t be just any square cardboard boxes, because you’ll be able to design and print the entire surface, inside and out. What better way to make your brand memorable from every angle? Our custom square mailer boxes are great for smaller subscription orders, apparel, books, stationery, beauty products and more. If you’re looking for boxes with a larger capacity for bigger products or combination orders, check out our mailer boxes.

Intuitive design tools

Maybe you’re new to designing, or maybe you already have a unique logo or design of your own. Using our 3D design studio , you can create the look you’re searching for. Choose from one of our many custom design templates or upload your own logos, images, fonts or patterns (be sure to remove any die-lines to prevent them from getting printed). The 3D view lets you see what your boxes will look like in real life. Just make sure you remove the die-lines from your uploaded image before printing, otherwise they will appear on your final product. And that’s it, just sit back and wait for your professionally printed square mailers to arrive.

VistaPrint offers Square Mailer Boxes design templates in assorted styles.

Designs

Select a design template to preview it on the product. Click 'Continue' to customize it.

Reviews

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Ratings Distribution

Reviewed by 20 customers

FLAWLESS CUSTOM DESIGNED BOXES

Aug 5, 2025 | Trina B. | Verified Buyer
These custom boxes I ordered for my book sets were absolutely fire!! I can’t wait to order more!!🔥🔥

Perfect Mailer Boxes

Jul 22, 2025 | JetsetterAgent | Verified Buyer
My clients love to receive their amenity kit in these high-durable mailer boxes. Vista allows you to customize the design with a simple upload. In doing so, I have been able to design stunning mailer boxes that align with the company's branding.

Marketing box

Jul 4, 2025 | Rocherre W. | Verified Buyer
Decent quality. It doesn't look cheap but it doesn't look expensive either. My logo came out really nice. Its bigger than I thought it would be.

Happy customer

Jun 3, 2025 | Ray A. | Verified Buyer
I've been searching through various websites trying to find the perfect packaging for my products and VistaPrint certainly delivered. Their customer service is top notch. The UI for creating a custom package is easy to use and most importantly they get you your product quickly. Love the turn around times and I highly recommend using them for your packaging needs.

Mailer

Feb 4, 2025 | Kerri R. | Verified Buyer
Looks amazing
Displaying Reviews 1-5

Work with a designer

Let us design it for you

No more guesswork. We take care of the entire design process, from brainstorming ideas to delivering the files to your account.

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Frequently asked questions

The box will arrive flat-packed, but assembly is simple. Check out our video in the “Overview” section that walks through assembling your box for the first time.

We offer various ways for you to start designing. You can download one of our many templates, upload your own unique design, or use one of our design services. Remember to remove the die-lines from your uploaded image, otherwise they will be printed along with your design.

Our square mailers are made of white B-flute, corrugated cardboard, which is strong enough to endure most shipping scenarios.

Here is the weight of each box according to its size:

  • 12" x 12" x 2.25": 8 oz.
  • 14" x 14" x 2.25": 10 oz.

Yes, VistaPrint’s square mailers are widely recyclable, based on many recycling programs. This may vary depending on the area in which you are using and trying to recycle our products, so we recommend you check in with local resources and recycling programs to confirm.

Yes, you can. There’s no minimum quantity order. Whether you need 1 custom-printed square mailer box with your design to check the quality or a larger batch for your full order, we’ve got you covered.

Yes. You can order sample boxes in all our available sizes. We'll send a box pre-printed with a sample design for only $4 – and get free standard shipping when you use code SAMPLEBOX at checkout. This way, you can get a feel for the quality and try out different sizes before you order your one-of-a-kind design in bulk. Order your sample square mailer boxes now. And if you'd like to see your unique design in print, you can order 1 custom-printed square mailer box on this page to make sure everything looks as you envisioned before placing your bulk order.