Custom Branded Mailer Boxes

More Than Just a Box—It’s a Portable Brand Experience

From doorstep delivery to social media stories, our branded mailer boxes make your brand impossible to forget.

Materials That Mean Business (and Branding)

We use durable, high-performance materials that stand up to shipping and make a premium impression.

• E-flute or B-flute corrugated cardboard for strength
• Kraft brown, matte white, or jet-black board stock
• Coated or uncoated options for your preferred finish
• 100% recyclable, compostable, and eco-conscious

Custom Printing That Brings Your Brand to Life

Why stay inside the box when you can brand it inside and out?

• Full-color CMYK or Pantone-matched printing
• Inside/outside print for total brand immersion
• Foil stamping, embossing, spot UV for premium effects
• QR codes, unboxing instructions, or social tags included

Sized for Your Product—Styled for Your Customer

Whether you’re mailing a single tee or an entire lifestyle kit, we custom-fit your box for the perfect presentation.

• Small, medium, large, or fully custom dimensions
• Locking flaps for secure closure—no tape needed
• Add inserts for protection or product arrangement
• Flat-fold shipping for easy storage, quick setup

Add-Ons That Upgrade the Unboxing Experience

Make opening your box an unforgettable moment.

• Custom tissue paper, stickers, belly bands, or thank-you cards
• Printed interior messages, affirmations, or instructions
• Perforated tear strips or magnetic closures (optional)
• Gloss, matte, or velvet-soft coatings for signature feel

The 3Ps Approach

Presentation

Make your customer feel like they’re unwrapping a gift—not just opening a box.

Preservation

Our corrugated structure keeps your products safe from bumps, drops, and wear during transit.

Protection

Moisture-resistant, crush-tested, and built for eCommerce shipping—your products arrive as perfect as they left.

Why 5,000+ Brands Trust Custom Boxes Lab for Branded Mailer Boxes

Because we know how to turn shipping into a marketing moment.

• Low MOQs — ideal for launches, small drops, and seasonal boxes
• Free dieline setup & artwork support
• Fast U.S. production & delivery
• Eco-friendly materials and FSC-certified board
• A creative team that understands eCommerce, retail, and what makes people share online

Let’s Ship Your Brand in a Box They’ll Never Forget

Whether it’s for influencers, subscription customers, or your first product drop—we’ll help you create a branded mailer box that ships strong and speaks loud. To get cost-effective packaging boxes without compromising on quality, you can contact us at (469) 649-8706 or email us sales@customboxeslab.com

When measuring a custom box, there are a few technical specifications that must be considered to ensure proper design, manufacturing, and fit for the product. Here are the major technical things to measure a custom box:

Inside Dimensions (Critical for Product Fit)

• Length (L): The longest side of the box measured inside from one corner to the opposite corner.
• Width (W): The shorter side of the box measured inside perpendicular to the length.
• Depth/Height (D or H): Measured inside from the bottom to the top opening of the box. Always specify that dimensions are given in Length × Width × Height.

Outside Dimensions (Important for Shipping & Storage)

• Measure the outer surfaces of the box including material thickness.
• Outside measurements are used for pallet stacking, warehouse spacing, and shipping compliance.

Material Thickness (Board Caliper)

• The thickness of the packaging material (e.g., corrugated board, rigid stock, cardstock).
• Impacts both the internal usable space and external dimensions.

Flap Measurements

• For boxes with flaps (e.g., mailer or shipping boxes), measure:
• Inner flaps: Ensure they meet in the middle without overlapping too much.
• Outer flaps: Allow proper sealing without gaps.

Tolerances

• Account for manufacturing tolerances (usually ±1/16" or ±2mm depending on material).
• Ensure the product fits without being too tight or loose.

Volume Capacity

• Calculate internal cubic capacity (L × W × H).
• Helps in determining how much space the product will occupy and shipping efficiency.

Product Orientation

• Decide how the product sits inside the box and measure accordingly.
• Orientation affects whether length or width is the primary dimension.

Die-Cut Openings or Windows

• Measure exact placement, height, and width for any cutouts.
• Ensure structural integrity when adding windows.

Printing Bleed & Safe Zones

• Include measurements for:
• Bleed area: Extra space beyond the cut line for printing.
• Safe zone: Inner area where critical text or logos should be placed.

Closure Type & Locking Tabs

• Measure slots, tabs, or locks for boxes with custom closures.
• Precision is required to avoid misalignment during assembly.

Packaging Style

• Folds, creases, and scores must be measured for accurate dieline creation.
• Different styles (e.g., RSC, tuck-end, mailer, sleeve) require specific panel measurements.