Extra stiff, lightweight mailer box that fits your products perfectly – unbeatable price with up to 50% savings.


Dimension note:

  • Length = longest side of the box opening

  • Width = shorter side of the box opening

  • Depth = from the opening to the bottom of the box

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Ultra Rigid 3-Layer Mailer Boxes (Length: 7
Production Time

2–4 business days after order received

Shipping Time

Fastest 5 days via express, slower options available

Unbeatable Price

Save at least 50% on your packaging costs

Eco-friendly Materials

Made from sustainable, biodegradable cardboard

Low Price ≠ Low Quality

Exceptional strength, better protection, lower cost.

Strong Enough to Stand On

We’ve perfected the cardboard design to deliver better quality at lower cost.

Ultra-stiff mailer box keeps your products safe and intact, no matter the load.

  • Holds up to 100kg without bending

  • Lightweight yet ultra-stiff

  • Eco-friendly 3-layer construction

  • Extensive size options for a perfect fit

  • Choose from 5 colors

Frequently Asked Questions

1. Are the dimensions listed for the inner or outer box?

The dimensions on the product page generally refer to the inner box size. However, due to cardboard cutting and bending during production, there may be a ±0.1 inch variance.

2. Can I customize my own logo on the mailer box?

We offer full-color custom printing for mailer boxes. 

If you only want to print a logo, we recommend using our transfer labels or stickers to apply your logo to the box, which is often more cost-effective.

3. Can I buy less than a bundle?

Currently, we only sell in bundles. 

The quantity per bundle depends on the box size and is determined by optimal production and shipping costs. This is also one of the reasons we can offer such low prices.

4. Why is there a sample fee? Can I just pay for shipping?

With over 5,000 size SKUs, we cannot keep all sizes in stock. 

Each sample is made to order, so the sample fee covers cutting dies, labor, and machine setup costs.

5. If I order today, how long will it take to receive the boxes?

Production usually takes about 3 business days, but shipping takes around 3 weeks. 

Due to the oversized nature of the boxes, we ship via economy ocean freight first, then deliver from the port to your address via FedEx/UPS, which keeps shipping costs as low as possible.


We generally recommend ordering your quarterly supply of commonly used sizes to optimize cost and availability.

6. Is there a discount if I order multiple sizes?

Yes! When you add multiple sizes to your cart, our website will automatically apply a multi-size discount, helping you save even more.