Custom Triangle Document Box Mailer

This smart take on old-fashioned mailing tubes lets you send your papers, blueprints or artwork out with the style and structure they deserve. Its heavy-duty structure is custom made to level up your brand appeal while providing greater stability and protection. And unlike a mailing tube, it will never roll away!

Eligible triangle document box mailers are digitally printed in 10-12 business days after final art approval.

Learn more about printing options including Litho and Flexo.

Not ready yet? Order a custom sample and apply its value to an order of $1,000 or more. 

    Interior Dimensions rounded up to closest 1/4"

    Range: 3.0 - 25.0
    Range: 3.0 - 25.0
    Range: 2.0 - 25.0
    Width cannot be larger than length
    Minimum & Maximum Quantities

    Box Genie offers custom box orders starting at 100 units with no maximum limit. For custom box inserts, the minimum order quantity is 250 units.

    Pricing decreases with larger volumes, and Box Genie provides first-time and bulk discounts.

    Materials & Product features

    Box Genie offers two flute types for corrugated packaging:

    1. E-Flute: Ideal for lightweight items, providing strength and crush-resistance for mailer boxes.
    2. B-Flute: Suitable for heavy products, offering increased resistance during shipment, commonly used for shipping boxes.

    For specific fluting needs, please call (816-414-3000). Our corrugate is made of recycled content and fully recyclable.

    Print Methods

    Box Genie is a G7® Certified Printer using GRACoL® 2013 settings for top-quality prints. We primarily use digital printing with water-based inks for vibrant graphics. Flexographic and lithographic printing options are available for specific needs.

    Contact our experts for litho and flexo printing requirements.

    Note: Paper type choice affects color vibrancy and printing precision.

    Self-Design Your Triangle Mailers

    Start by entering your box dimensions, paper type, print quantity, and unit amount. Then, choose how to begin your box project:

    Option 1: “Design Box Online”

    Use our 3D Design Tool and proceed to checkout.

    Option 2: “Order Now & Send In Your Design”

    Your order confirmation email will include instructions for your box artwork.

    Let's Get Going +

    Choose Your Box Paper Type

    Each of the three paper types in Box Genie’s curated collection offers a unique look and feel. Pick from our available paper options to enhance your box design:

    Custom Kraft Packaging

    Kraft

    Perfect for achieving an organic look, Kraft paper beautifully showcases dark colors. Even lighter inks appear a few shades darker.

    Matte Custom Packaging

    Essential White

    Ideal for a softer appearance, Essential White features a matte finish. It offers a cost-effective solution to quality print and color.

    Semi-Gloss Custom Packaging

    Magic White

    The top choice for vibrant print and color richness, Magic White features HD printing and is finished with a sleek semi-gloss.

    WHAT OUR CUSTOMERS ARE SAYING:

    High-Quality Corrugated Boxes
    Branded By You

    Promote your product line on every inch of your box—inside and out, from corner to corner.

    Branded Boxes Made in Kansas City Missouri
    Made In KC

    Your boxes are crafted from 100% American-made materials by our dedicated team in Kansas City.

    Sturdy Corrugated Boxes
    Designed To Impress

    Build buzz for your PR campaign, product launch, or limited release with a custom-designed specialty box.

    Reliably Fast, Remarkably Crafted

    Our Missouri facility features state-of-the-art printers and cutting machines, enabling us to produce eligible box orders in just 10-12 business days or less. Thanks to our strategic central location, Box Genie orders reach their destinations quickly.

    Every packaging project adheres to strict quality standards from order processing to carrier handoff, ensuring you never have to sacrifice quality for a tight deadline.

    Get Your Boxes in Queue +

    FAQs

    How do I find the measurements for my box?

    Please note that it is an industry standard to almost always present the inside packaging measurements of custom boxes. These are displayed as L x W x D (Length x Width x Depth) in the unit of inches.

    1. Lay out the item or items on a table or flat surface just as you wish to display them in the final packaging.
    2. Measure and record the L x W x D.
    3. Finally, round up to the nearest 1/16 of an inch for each measurement. This will ensure every item is packaged just right.
    Do you have design guidelines for me to reference?

    Yes! Please reference boxgenie.com/design-guidelines for our full set of best practices.

    How do I design my custom box offline or in a different program?

    Box Genie supports designs generated in a program outside of our online design tool.

    Start by selecting your desired box type from boxgenie.com. Next, enter your box dimensions, paper type, and the number of printed sides (inside, outside, both). From here you will have two options:

    • Select "Order Now": You will receive email instructions on how to submit your design.
    • Select "Design Online": You will enter the 3D Design Tool. Choose "More" > "Download Template" from the left-hand panel.

    Once your artwork is complete, revisit boxgenie.com. Submit your template from the "Upload Completed Template" option in the 3D Design Tool.

    Alternatively, you may submit your template via live chat or email with a dedicated Box Genie representative. Our team suggests using Adobe Illustrator to create your artwork and convert it into a PDF. If you using Adobe Photoshop, you will need to design in CMYK at 300 DPI and 100% of the finished size. If using a different app or file type, please reach out to our Support Team (help@boxgenie.com) for assistance.

    Note: It is important that you do not flatten your dielines into the graphics.

    Recyclable Custom Branded Boxes
    Selectively Sourced

    Box Genie carefully selects 100% American-made materials, including corrugated packaging made from recycled content that can be fully recycled after use.

    Food-Safe Boxes
    Water-Based Inks

    Box Genie uses odorless, nontoxic, water-based inks that are applied without UV-reactive chemicals, making them safe for food packaging.

    Eco-friendly Boxes
    Geothermal Facility

    Our facility is designed to minimize our environmental footprint and is powered by geothermal energy. You’d have to travel 160 feet underground to take a tour!

    Sustainable Packaging Solutions for a Better Future

    At Box Genie, we are dedicated to sustainability, from using eco-friendly materials and water-based inks to operating our geothermal-powered facility, all to minimize our environmental impact.