A deep dive into custom mailer boxes — sizes, materials, printing options, and why they are the #1 choice for e-commerce brands shipping across the USA.
Why Mailer Boxes Dominate E-Commerce Packaging
Custom mailer boxes have become the default packaging choice for direct-to-consumer brands. Their tuck-end closure eliminates the need for tape, creating a cleaner unboxing experience while reducing packing time by 30%. In 2026, over 60% of e-commerce brands use custom printed mailer boxes for their shipments.
The beauty of mailer boxes lies in their versatility — they ship flat to save warehouse space, assemble in seconds without tools, and provide full interior and exterior printing surfaces for complete brand immersion.
Mailer Box Sizes and Dimensions
We offer fully custom sizing, but here are the most popular dimensions:
- Small (6×4×2 inches): Jewelry, cosmetics, small accessories, sample kits
- Medium (10×8×4 inches): Clothing items, shoes, beauty kits, small electronics
- Large (14×10×5 inches): Electronics, gift sets, subscription boxes, multiple items
- XL (18×14×6 inches): Clothing bundles, large gift hampers, bulky products
Not sure which size you need? Share your product dimensions with us and we will recommend the optimal box size. Request a free size consultation.
Material Options
E-Flute Corrugated (1.5mm)
Lightweight yet strong — ideal for items under 2kg. Offers a smooth printing surface that delivers sharp CMYK reproduction. Ships flat to save 80% storage space compared to assembled boxes.
B-Flute Corrugated (3mm)
Double the protection of E-flute. Best for fragile or heavy products that need extra transit security. The thicker wall absorbs more impact during shipping.
White SBS Board
Premium white surface for the most vivid print results. Slightly less protective than corrugated but creates a luxury feel that works perfectly for beauty and fashion brands.
Interior Printing: The Unboxing Secret
Interior printing transforms a standard mailer into a brand experience. When customers open the box, they are greeted with your brand colors, a thank-you message, or product care instructions. Studies show interior-printed mailers increase social media sharing by 40% compared to plain interiors.
Mailer Boxes vs Shipping Boxes
Many brands confuse mailers with standard shipping boxes. Here is the difference:
- Mailer boxes: Self-locking tuck ends, branded printing inside and out, premium unboxing feel. Used for DTC and subscription brands.
- Shipping boxes: RSC (Regular Slotted Container) with tape closure. Stronger for heavy items but no unboxing experience. Used for wholesale and B2B.
Need shipping boxes instead? Browse our corrugated shipping options.
Subscription Box Packaging
Mailer boxes are the preferred choice for subscription services. Key features for subscription brands include seasonal design rotations to keep customers excited, perforated tear strips for easy opening, and consistent sizing for efficient fulfillment operations.
Eco-Friendly Mailer Options
All our mailer boxes are available in FSC-certified, recycled, and biodegradable options. Water-based inks and aqueous coatings ensure full recyclability. Explore eco-friendly packaging.
Cost Breakdown
Custom mailer box pricing depends on size, material, and quantity:
- 50-200 units: $2.50 - $5.00 per box
- 200-1,000 units: $1.50 - $3.00 per box
- 1,000-5,000 units: $0.80 - $2.00 per box
- 5,000+ units: $0.50 - $1.50 per box
These prices include full CMYK printing, free design support, and free shipping. Read our full pricing guide.
Order Your Custom Mailer Boxes
No minimum order — start from just 50 units. 7-day production with rush options available. Free design support including dielines and 3D mockups. Browse mailer boxes or get a free quote.
Related: Complete packaging guide | Packaging ideas for small businesses