Boxes & Mailers

SELECTION EXPERT ADVICE

Wall Strength & Load Capacity
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Match single-, double-, or triple-wall corrugated construction to your product weight to prevent in-transit damage and minimize costly returns.
Dimensional Weight Cost Control
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Right-sized boxes cut carrier DIM weight charges, selecting the optimal LxWxH for each SKU directly lowers your per-shipment freight cost.
Mailer Box vs. RSC: Choose Correctly
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Self-locking mailer boxes suit branded DTC shipments; traditional RSC corrugated boxes are ideal for palletized B2B and high-volume fulfillment.

Need help choosing boxes?

Pick the right corrugated box without overpaying for size or strength

Use these buying guides to size your box, compare board strength, and avoid dimensional weight surcharges.

Corrugated Boxes Guide → How to choose size, strength, and wall type Box Size Calculator → Find the smallest safe box for your product 32 ECT vs 200 lb Test → Which board strength rating fits your shipment
Overview

3,094 corrugated boxes, literature mailers and mailing tubes from 2 to 36 inches, mostly ECT-32 kraft and white, sold in bundles of 10 to 50. Each listing shows inside dimensions, board grade and bundle count so you can match a carton to the part you ship. Orders ship from five US regional warehouses; for mixed or recurring orders use the bulk quote path with SKU, quantity and destination ZIP.

Related collections

IN STOCK Heavy-duty 24x18x20 corrugated boxes built from ECT-32 kraft material for dependable stacking and freight protection. This bundle of 15 boxes delivers standard strength performance at volume savings. Fully recyclable and ready to ship.
Boxes - Corrugated

24x18x20 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 241820

24 x 18 x 20 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$89.43 / BUNDLE
IN STOCK Professional-grade 24x18x18 deluxe packing boxes engineered for high-volume warehouse and fulfillment operations. ECT-32 single-wall kraft construction delivers dependable stacking strength across multiple pallets. Innovative flap tab design keeps carton flaps secure during handling, reducing packing time and material waste.
Boxes - Corrugated

24x18x18 ECT-32 Kraft Corrugated Moving Boxes 10-Pack

PN: 241818DPB

24 x 18 x 18 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$55.53 / BUNDLE
IN STOCK Upgrade to ECT-44 single wall kraft corrugated boxes engineered for maximum stacking performance and freight efficiency. These 24x18x18 heavy-duty cartons deliver 40% greater strength than standard shipping containers, reducing damage rates and supporting heavier loads. Ships flat in convenient bundles of 10 for easy storage and cost-effective volume purchasing.
Boxes - Corrugated

24x18x18 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 10-Pack

PN: HD241818

24 x 18 x 18 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$53.89 / BUNDLE
IN STOCK Multi-depth corrugated boxes designed for warehouse managers who need flexible sizing without multiple SKUs. These 24x18x18 kraft cartons feature pre-scored sides that fold to 3 different heights, eliminating the need for a carton sizer. Sold as a bundle of 15 boxes with ECT-32 single wall strength.
Boxes - Corrugated

24x18x18 ECT-32 Kraft Multi-Depth Corrugated Shipping Box 15-Pack

PN: MD241818

24 x 18 x 18 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$66.33 / BUNDLE
IN STOCK Industrial-grade 24x18x18 corrugated boxes engineered for reliable stacking and freight efficiency. ECT-32 single-wall kraft construction delivers 4.5 cubic feet of capacity per carton. Ships flat in bundles of 10 to maximize warehouse storage and reduce inbound shipping costs.
Boxes - Corrugated

24x18x18 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 241818

24 x 18 x 18 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$39.84 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes in 24x18x16" dimensions–the workhorse size for mid-weight industrial shipping and storage. Bundle of 15 units delivers proven stacking performance and freight efficiency for warehouse operations. Recyclable corrugated construction meets cost and sustainability standards.
Boxes - Corrugated

24x18x16 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 241816

24 x 18 x 16 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$59.11 / BUNDLE
IN STOCK Premium ECT-44 single wall kraft corrugated boxes deliver 40% greater stacking strength than standard shipping containers. These 24x18x12" heavy-duty cartons maximize load integrity and freight efficiency in every pallet position. Sold as bundles of 15 boxes, flat-packed for minimal storage footprint.
Boxes - Corrugated

24x18x12 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 15-Pack

PN: HD241812

24 x 18 x 12 in ECT-44 Single Wall Corrugated 15 PER BUNDLE
$75.88 / BUNDLE
IN STOCK Adjustable height corrugated boxes that fold to your ideal size–no carton sizer needed. ECT-32 kraft construction handles heavy items while pre-scored sides eliminate inventory bloat and parcel overage charges. Perfect for warehouse managers seeking freight efficiency and cost control.
Boxes - Corrugated

24x18x12 ECT-32 Kraft | Multi-Depth Corrugated Shipping Boxes 10-Pack

PN: MD241812

24 x 18 x 12 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$35.17 / BUNDLE
IN STOCK 24x18x12 Kraft Corrugated Heavy Duty Shipping Boxes, 350 Pack Pallet, 32 ECT
Boxes - Corrugated

24x18x12 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 10-Pack

PN: 241812

24 x 18 x 12 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$31.70 / BUNDLE
IN STOCK Bundle of 10 durable 24x18x10 kraft corrugated boxes manufactured from ECT-32 single-wall material–the industry standard for mid-weight shipping. Designed for warehouse managers and fulfillment directors seeking reliable, cost-effective cardboard shipping containers that maximize stack performance and minimize freight costs.
Boxes - Corrugated

24x18x10 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 241810

24 x 18 x 10 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$32.72 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes engineered for reliable mid-weight shipping and storage. 24" x 18" x 8" dimensions pack efficiently on pallets, maximizing freight density while maintaining structural integrity. Sold as a bundle of 20 cartons.
Boxes - Corrugated

24x18x8 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 24188

24 x 18 x 8 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$60.33 / BUNDLE
IN STOCK Ship shallow products efficiently with these 24x18x6 kraft corrugated boxes featuring ECT-32 single-wall construction. Bundle of 20 flat cartons optimizes warehouse storage and reduces freight costs. Ideal for apparel, books, frames, and artwork.
Boxes - Corrugated

24x18x6 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 24186

24 x 18 x 6 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$56.04 / BUNDLE
IN STOCK 24x18x4 Kraft Corrugated Shipping Boxes, 460 Pack Pallet, 32 ECT
Boxes - Corrugated

24x18x4 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 24184

24 x 18 x 4 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$48.41 / BUNDLE
IN STOCK Heavy-duty 22x20x20 corrugated boxes built from ECT-32 kraft material for reliable shipping and storage. Bundle of 15 boxes delivers maximum stacking strength and freight efficiency for warehouse operations. Recyclable kraft cartons meet industrial shipping demands at volume savings.
Boxes - Corrugated

22x20x20 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 222020

22 x 20 x 20 in ECT-32 Corrugated 15 PER BUNDLE
$104.30 / BUNDLE
IN STOCK Move inventory faster with our 22x20x14 ECT-32 kraft corrugated boxes–engineered for standard-weight industrial shipping. Each bundle includes 15 boxes, delivering cost-effective strength and stackability for warehouse operations. Recyclable kraft construction keeps your fulfillment operations sustainable.
Boxes - Corrugated

22x20x14 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 222014

22 x 20 x 14 in ECT-32 Corrugated 15 PER BUNDLE
$58.56 / BUNDLE
IN STOCK Heavy-duty 22x20x10 corrugated boxes built from ECT-32 kraft material for dependable performance in high-volume fulfillment operations. This bundle of 15 shipping cartons delivers the strength you need to protect goods while minimizing freight costs. Recyclable kraft construction meets sustainability standards without compromising box integrity.
Boxes - Corrugated

22x20x10 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 222010

22 x 20 x 10 in ECT-32 Corrugated 15 PER BUNDLE
$51.77 / BUNDLE

Product Help Request

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Buying path

Buy Boxes & Mailers by the specs that change the order

Use filters, product titles, and product pages to compare size, material, pack count, case quantity, and fit before ordering.

Compare

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Confirm

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Reorder

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Larger orders

For pallet, recurring, or mixed-SKU orders, send your list and ZIP and get a delivered price by email.

What to check first

  • Inside dimensions
  • Board grade or strength rating
  • Box style and closure
  • Case or bundle quantity
Common wrong-order risk: Choosing the outside size instead of the inside size. Confirm product fit, void fill, and storage space before ordering.
Use the box size finder -> Get a delivered quote for larger orders -> Compare corrugated box types -> View products below ->