
Flat Corrugated Boxes
- 84 size variations for flat product needs
- Shallow depth design for low-profile items
- Starts as low as $0.98 per box unit
ASTM D5118 Certified
ASTM D4727 Certified
CSA Class Code A Certified
28x24x6 corrugated shipping boxes are large-format, flat/shallow-depth corrugated boxes ideal for shipping oversized yet low-profile items. Built from sturdy corrugated cardboard, they suit e-commerce fulfillment, retail packaging, artwork shipping, and general freight, offering reliable protection with a wide inner volume for flat, wide products.












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28x24x6 corrugated shipping boxes are designed for large, flat, and shallow items such as artwork, framed pictures, posters, apparel, electronics accessories, and wide retail products. Their generous footprint and shallow depth make them ideal for e-commerce fulfillment, freight shipping, and retail packaging where a low-profile box is needed.
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Flat 28x24x6 boxes minimize dimensional weight charges and protect wide products during parcel carrier shipping.

Ideal for safely packaging and shipping framed artwork, posters, canvases, and large printed materials.

Shallow corrugated boxes protect folded clothing, textiles, and apparel during fulfillment and storage.

Used for packaging large flat components, parts, and assemblies requiring sturdy corrugated protection in transit.
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With more than 1,300 corrugated box sizes available, finding the exact 28x24x6 fit for your product is fast and hassle-free.
All boxes meet ASTM D5118, ASTM D4727, and CSA Class Code A standards, ensuring reliability for regulated and specialty shipping needs.
From flat shallow boxes to military-spec corrugated, Cardboard Boxes 4 U offers hard-to-find configurations and custom printing for branded packaging.
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