Mailer Envelope
Need packaging that keeps documents or products secure during mailing?
Our custom mailer envelopes are designed for durability, protection, and a clean professional appearance — ideal for shipping paperwork, promotional items, small goods, or marketing materials.
These envelopes come in various sizes and materials, with options for padding, printing, and secure sealing to match your mailing needs.
Whether you’re a business shipping daily or sending occasional campaigns, our mailer envelopes combine function and branding.
Availability: In Stock

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Designed To Deliver Confidence
We help you create mailer envelopes that look professional and stay secure — with strong sealing, sharp printing, and materials built to last through transit.
Material Options
Choose what fits your shipment type best:
- Paperboard – Lightweight and cost-effective
- Kraft – Durable and eco-friendly
- Poly mailers – Water-resistant and tear-proof
- Bubble-lined – Extra protection for delicate items
- Tyvek – Ultra-tough, weatherproof, and lightweight
Custom Sizes Available
From small documents to larger merchandise, we offer custom sizing that fits your specific products without unnecessary bulk or gaps.
Sharp, Branded Printing
We use high-quality printing techniques like digital, offset, and CMYK to print logos, return info, or full-color branding with crisp, lasting clarity.
Add-ons That Secure & Impress
Improve usability and impact with features like:
- Peel & seal closures
- Tamper-evident strips
- Custom windows
- QR codes or barcodes
- Writable surfaces for labeling
Mailer Envelope Types
We supply a variety of envelope styles, including:
- Flat mailers
- Padded or bubble mailers
- Expansion mailers
- Poly mailers
- Full-color printed promotional envelopes
We Focus on the 3Ps
Each mailer envelope is designed with:
- Presentation – Clean layout and professional branding
- Preservation – Keeps items dry, safe, and intact
- Protection – Reinforced seams, secure seals, and tear-resistant materials
Premium Finish Options
Make your envelopes stand out and perform better with:
- Matte or gloss lamination
- Soft-touch coatings
- Foil stamping
- Embossing or debossing
- Spot UV for logo or design highlight
Why Choose Us?
We specialize in making mailer envelopes that reflect your brand and protect your contents from door to door. Trusted by businesses of all sizes, we offer:
- Design help at no extra cost
- Flexible minimum order quantities
- Fast turnaround times
- Strong, eco-conscious materials
- Nationwide shipping options
- Reliable quality control
Get A Quote
Need secure, stylish, and custom mailer envelopes?
Call us at 0000 or send an email to get started on your order today.
Dimensions | All Custom Boxes & Shapes, Paper Bags, Mylar Bags, Tube Packaging |
Availability | InStock |
Printing | No Printing, CMYK, CMYK + 1 PMS Color, CMYK + 2 PMS Colors |
Paper Stock | 10pt to 28pt (60lb to 400lb) Eco-Friendly Kraft, E flute Corrugated, Bux Board, Cardstock, Mylar, Paper Bag Stock, Tube Paper, Bespoke Packaging Materials |
Quantities | No Minimum Order Required |
Coating | Gloss, Matte, Spot UV, Holographic Foiling, Gold Foiling, Embossing, Silver Foiling, Debossing |
Default Process | Die Cutting, Gluing, Scoring, Perforation |
Options | Custom Window Cut Out, Gold/Silver Foiling, Embossing, Raised Ink, PVC Sheet, Bespoke Die-Cuts |
Proof | Flat View, 3D Mock-up, Physical Sampling (On request) |
Turn Around Time | 7-10 Business Days, Rush Available |
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.
Delivering Premium Packaging. Materials Tailored for Your Brand and Product.

Cardboard
Giving cardboard material option to give versatility and durability to your box, widely used in many industries.

Kraft
Offering eco-friendly kraft material for your product with the least environmental impact and minimizing waste.

Rigid
Offering you premium rigid boxes, perfect for luxury packaging and high-end presentation.

Corrugated
Custom Boxes Lab specializes in strong, reliable corrugated boxes ideal for shipping and storage.