ASTM D5118 certified

ASTM D5118 Certified

ASTM D4727 certified

ASTM D4727 Certified

CSA Class Code A certified

CSA Class Code A Certified

Custom Size Storage Boxes

Custom Size Storage Boxes from Cardboard Boxes 4U are precision-engineered corrugated packaging solutions built to exact dimensions. Available in single, double, and triple wall constructions, they serve e-commerce, industrial, military, and retail applications. With over 1,300 sizes and 7–10 day lead times on custom orders, they minimize void space and reduce shipping costs.

Military Boxes
Stock Boxes
Shipping Boxes
Telescoping Boxes

Our Range of Products

Military Boxes

Military Boxes

  • MIL-SPEC V3c & W5c weather-resistant boxes
  • ASTM D5118 compliant for military use
  • Custom sizes made to order on request
Stock Boxes

Stock Boxes

  • Custom-sized to exact product dimensions
  • Low 100-piece minimum order quantity
  • Full-color custom print options available
Shipping Boxes

Shipping Boxes

  • 1,000+ stock sizes for immediate fulfillment
  • Single, double & triple wall construction
  • Custom sizes ready in 7–10 business days
Telescoping Boxes

Telescoping Boxes

  • 2-piece adjustable telescoping design
  • 200#/ECT-32 heavy-duty kraft corrugated
  • F.O.L. bottom for added structural strength

Frequently Asked Questions

What is the minimum order quantity for custom size storage boxes?

The minimum order quantity for custom size storage boxes at Cardboard Boxes 4U starts at 100 pieces. This makes custom corrugated boxes accessible for small businesses as well as large-volume industrial or commercial operations. Contact the sales team for volume pricing on larger runs.

How long does it take to produce custom size corrugated boxes?

What wall construction options are available for custom boxes?

Can custom storage boxes be printed with branding or logos?

Are custom boxes available in military or government specification grades?

What industries are custom size storage boxes used in?

How do I determine the right box size and strength for my product?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

E-Commerce & Retail

E-Commerce & Retail

Right-sized custom boxes reduce dimensional weight charges and enable branded unboxing experiences for online retailers.

Military & Government

Military & Government

ASTM-certified MIL-SPEC weather-resistant corrugated boxes designed for government procurement and hazmat shipping.

Industrial & Bulk Shipping

Industrial & Bulk Shipping

Heavy-duty triple wall and Gaylord boxes for palletized freight, master packing, and large-scale industrial cargo.

Electronics Manufacturing

Electronics Manufacturing

Conductive and static-resistant corrugated boxes safeguarding sensitive electronic assemblies during shipping and storage.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

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Why E-Commerce, Industrial & Government Buyers Choose Cardboard Boxes 4 U

1,300+ Custom & Stock Box Sizes

Access over 1,300 corrugated box sizes including hard-to-find configurations like Fanfold, V3C, W5C, and V11C government spec corrugated.

Military & Specialty Compliance

MIL-SPEC and ASTM-certified boxes engineered for government, hazmat, and weather-resistant shipping applications with full compliance documentation.

Custom Boxes in 7–10 Business Days

Custom-sized corrugated boxes manufactured to your exact dimensions with fast 7–10 day lead times and low minimums starting at 100 pieces.

Get a Quote for Custom Size Storage Boxes Today

Submit your dimensions and requirements. Our packaging experts will respond with pricing, lead times, and sample options within one business day.

Contact Us Today

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