
Military Boxes
- MIL-SPEC V3c & W5c weather-resistant boxes
- ASTM D5118 compliant for military use
- Custom sizes made to order on request
ASTM D5118 Certified
ASTM D4727 Certified
CSA Class Code A Certified
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.




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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.
Talk to our experts for custom solutions and tailored guidance.

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

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

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

Conductive and static-resistant corrugated boxes safeguarding sensitive electronic assemblies during shipping and storage.
Talk to our experts for custom solutions and tailored guidance.
Access over 1,300 corrugated box sizes including hard-to-find configurations like Fanfold, V3C, W5C, and V11C government spec corrugated.
MIL-SPEC and ASTM-certified boxes engineered for government, hazmat, and weather-resistant shipping applications with full compliance documentation.
Custom-sized corrugated boxes manufactured to your exact dimensions with fast 7–10 day lead times and low minimums starting at 100 pieces.
Submit your dimensions and requirements. Our packaging experts will respond with pricing, lead times, and sample options within one business day.
To help us assist you faster, please include the reason for your message so the relevant team can reach out as soon as possible.
To help us assist you faster, please include the reason for your message so the relevant team can reach out as soon as possible.