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Square Mailer Boxes

Samples available
Ship products in style with square mailer boxes. No secondary packaging needed. Available in quantities 1 to 600 – and orders over $100 ship free. See details
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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.

Reviews

(46 reviews)
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Reviewed by 46 customers

Absolutely wonderful
Aug 24, 2026 | David A. | 🇺🇸 United States |
Verified Buyer
Love how my customer mailer boxes came out! Definitely recommend

Beautiful Custom Mailer Boxes That Elevated My Brand
Aug 24, 2026 | Kendall O. | 🇺🇸 United States |
Verified Buyer
I ordered custom mailer boxes for my business, YahwehforHer, and I’m very happy with how they turned out! The boxes feel sturdy and professional, and having my branding printed directly on the packaging really elevated the overall experience I’m able to give my customers. I did have an issue with my original order where some of the boxes arrived with printing/ink marks that weren’t supposed to be there. However, Vistaprint’s customer service handled the situation well and sent replacements. The corrected boxes came out beautifully! As a small business owner, packaging is such an important part of presenting your brand, and these boxes give my journals the polished, intentional look I was hoping for. I would definitely order them again.

Loved my PR Box Sample!
Aug 21, 2026 | Daphne P. | 🇺🇸 United States |
Verified Buyer
We are hosting a big proyect in my non-profit. We want to make sure all the materials look good. Having the sample helped us make adjustments before we create a big order. Great service!

Everything I Hoped It Be
Aug 17, 2026 | Tiffany B. | 🇺🇸 United States |
Verified Buyer
I was surprised by this product. I had high hopes but I didn’t think the stars would align. I was wrong. The actual product was perfection. The printing quality far exceeded my expectations, and the size was perfect for everything I hoped to pack into the box. It is sturdy, easy to assemble, and I can’t wait for my next purchase! 100% worth it.

Exactly what I was looking for!
Aug 17, 2026 | Victoria A. | 🇺🇸 United States |
Verified Buyer
The mail boxes are very durable. The print came out fantastic and are perfect for my baking business. Highly recommend. VistaPrint has been really great for me starting my brand because they save all of my logos and patterns and so I can very easily switch between products and get the same result.

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.