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Flat Shipping and Packing Boxes

Flat shipping and packing boxes designed for efficient storage and transportation of flat, fragile, or oversized items. Our comprehensive selection includes side-loading, telescoping, and specialty flat boxes with adjustable sizing, self-seal closures, and heavy-duty protection for secure shipping across industries.

Our Range of Products

4-Piece Flat Boxes

Custom Fit Design
Glass Product Safe
Four-piece Construction

Side Loading Boxes

Full Overlap Protection
Easy Side Loading
Heavy-duty ECT Ratings

14 x 4 x 68" Side Loading Boxes

End Insertion Design
Full Overlap Flaps
Side Loading for Long Items

2-Piece Flat Boxes

Moving Industry Design
Fragile Glass Protection
Printed Fragile Warnings

White Side Loading Locking Mailers

Quick Assembly Design
Snug-fitting Tabs
Literature Perfect Fit

20 x 8 x 60" Side Loading Boxes

End Insertion Loading
Full Overlap Flaps
20 x 8 x 60 inch Size

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Frequently Asked Questions

What is a flat pack box?

A flat pack box is a corrugated shipping container designed for easy storage when empty and assembly when needed, ideal for flat or shallow items.

What ECT ratings are available for flat shipping boxes?

Can flat boxes be customized for specific dimensions?

Are self-seal flat boxes available without tape?

What's the difference between side-loading and regular flat boxes?

Do you offer volume pricing for bulk flat box orders?

How quickly can flat shipping boxes be delivered nationwide?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

E-commerce & Retail

Flat boxes perfect for shipping artwork, frames, books, and thin products with secure packaging.

Manufacturing

Heavy-duty flat boxes for shipping components, parts, and products requiring adjustable sizing.

Moving & Relocation

Specialty flat boxes designed for fragile glass items with printed warnings and protective features.

Document & Literature

White corrugated mailers with locking tabs perfect for business correspondence and document protection.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Why Manufacturing and Logistics Companies Choose Alliance Packaging Group

Factory Direct Pricing

Lower costs than industry standard with competitive volume pricing programs and immediate inventory availability.

Just-in-Time Delivery

Nationwide delivery programs with over 10,000 products in stock for same-day shipment across America.

Custom Solutions Engineering

Experienced engineering team provides tailored packaging solutions and expert consultation for specialized requirements.

Get Expert Packaging Solutions for Your Flat Shipping Needs

Connect with our packaging specialists for custom quotes, technical guidance, and volume pricing on flat boxes.

For immediate assistance, feel free to give us a direct call at 770-309-1012 You can also send us a quick email at sales@apg-go.com

Contact Us Today

For immediate assistance, feel free to give us a direct call at 770-309-1012 You can also send us a quick email at sales@apg-go.com

Flat Shipping and Packing Boxes

Didn't find what you're looking for?