Custom Square Mailing Tubes | No Minimums | DIYPack
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Square Tube Box

Sturdy, stylish, and made to protect. Create eco-friendly tube packaging with custom square tube boxes that showcase and safeguard your products - perfect for long items, specialty items, and promotional packaging..

No Minimums• Easy Design Software• No Middlemen• Quality Materials• Fast Turnaround• Eco-Friendly Inks•
Square tube box product image

What is a Square Tube Box?

Square tube boxes are long, four-sided cartons designed for slim or specialty items. Unlike round tubes, these boxes feature flat sides, making them easy to brand, stack, and ship. Their durable corrugated construction ensures products stay secure during storage, shipping, or on the store shelf.

Great for: posters, blueprints, artwork, rolled apparel, specialty retail items, promotional kits, and gift packaging.

How the Design Editor Works

Online editor options panel with tools for uploads, images, patterns, layers, and text

Use the Online
Editor Tools

Start inside the editor with quick access to uploads, images, patterns, layers, text, and built-in artwork options.

  • Browse layout tools in one sidebar
  • Add uploaded art, stock images, and clipart
  • Build designs with text, layers, and patterns
Flat dieline editor view showing the layout and swap control for editing both sides of the packaging

Align Art on the
Flat Dieline

Work directly on the unfolded dieline and swap between sides so your artwork lines up exactly where it needs to print.

  • Edit on the full flat layout
  • Swap views to see which side is being edited
  • Line up folds, panels, and key artwork areas
Live 3D preview of the package inside the online editor

Review the Live
3D Preview

Check the finished packaging in 3D before ordering so you can confirm placement, orientation, and overall presentation.

  • See the package as a finished object
  • Catch placement issues before checkout
  • Order with more confidence in the final result

Why Brands Choose DIYpack

  • Instant pricing, no quotes

    Transparent costs and shipping shown upfront — order with the full picture, no back-and-forth.

  • Made by the manufacturer

    Direct from our factory in 10-15 business days. No middlemen, no markups, no missed launches.

  • Recycled, recyclable materials

    Up to 99% recycled corrugate, fully recyclable, printed with water-based inks on a tooling-free press.

  • A circular supply chain

    Used corrugate is reclaimed and remade at our Encorr corrugator, powered by renewable steam.

  • Certifications you can stand behind

    SFI®-certified materials and SPC membership help support B Corp and ESG reporting goals — packaging your sustainability team can document with confidence.

    See our certifications

Our Sustainability

Sustainable designed square mailer in DIYpack online studio

Packaging built for a smarter planet.

Every DIYpack box is engineered with responsible sourcing, recycled fiber, and water-based inks — so your brand can ship with a smaller footprint without sacrificing print quality, durability, or speed. From the mill to the final mile, we're closing the loop at every step.

Our partnership with New Indy Paper Mill keeps used corrugate in motion: reclaimed material is remade into fresh board at our Encorr corrugator, powered by renewable steam from the mill itself.

Certifications & Practices

Sustainable Forestry Initiative (SFI®)

Sustainable Forestry Initiative (SFI®)

SFI®-certified materials support responsible forestry that protects water, wildlife, and natural habitats.

Sustainable Packaging Coalition

Sustainable Packaging Coalition

As SPC members, we stay ahead of industry sustainability trends and translate them into eco-friendly packaging solutions.

B Corp & ESG goals support

B Corp & ESG Support

Helping brands hit B Corp and ESG goals with circular design, responsible sourcing, and lifecycle data.

Frequently Asked Questions