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 ECT-32 kraft corrugated boxes designed for warehouse efficiency and reliable mid-weight shipments. 20x18x12 dimensions provide optimal stacking performance and freight versatility. Sold as a convenient bundle of 10 to streamline your bulk ordering.
Boxes - Corrugated

20x18x12 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 201812

20 x 18 x 12 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$32.32 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes in 20x18x10 dimensions deliver reliable standard strength performance for mid-weight products and general fulfillment. Each bundle of 10 boxes provides tested stacking durability and cost-effective inventory management. Fully recyclable kraft material supports sustainable warehouse operations.
Boxes - Corrugated

20x18x10 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 201810

20 x 18 x 10 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$29.42 / BUNDLE
IN STOCK Dependable ECT-32 kraft corrugated boxes sized 20" × 18" × 8" for mid-weight industrial shipping and storage. Each bundle contains 25 cartons, delivering consistent stacking performance and freight efficiency for high-volume fulfillment operations. Recyclable material reduces disposal costs.
Boxes - Corrugated

20x18x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 20188

20 x 18 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$70.35 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 20" × 18" × 6" designed for shallow product shipping. Bundle of 25 ships flat to maximize warehouse efficiency and reduce freight spend. Perfect for apparel, books, frames, and artwork with dependable stacking strength.
Boxes - Corrugated

20x18x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 20186

20 x 18 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$62.88 / BUNDLE
IN STOCK 20x18x4 Kraft Corrugated Boxes, 375 Pack Pallet, 32 ECT
Boxes - Corrugated

20x18x4 ECT-32 Kraft Corrugated Boxes 25-Pack

PN: 20184

20 x 18 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$78.43 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 20x8x6 ECT-32 kraft corrugated boxes. Wide openings along the length reduce packing time and labor costs. Sold in bundles of 25 and shipped flat to maximize your warehouse space.
Boxes - Corrugated

20x8x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 2086

20 x 8 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$28.32 / BUNDLE
IN STOCK Ship long and narrow items efficiently with our 28x10x10 ECT-32 kraft corrugated boxes. Wide openings along the length make packing wine bottles, umbrellas, and carpet rolls fast and easy. Sold in bundles of 25 flat-packed cartons for maximum freight efficiency and storage savings.
Boxes - Corrugated

28x10x10 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 281010

28 x 10 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$58.49 / BUNDLE
IN STOCK Designed for long, narrow items like wine bottles, umbrellas, and carpet rolls, these 26x12x12 corrugated boxes feature wide length-wise openings for fast packing and loading. ECT-32 kraft construction delivers reliable stacking strength and protection. Sold flat in bundles of 20 for maximum freight efficiency and storage savings.
Boxes - Corrugated

26x12x12 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 261212

26 x 12 x 12 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$53.53 / BUNDLE
IN STOCK Heavy-duty 24 x 14 x 20 corrugated shipping boxes with ECT-32 single wall construction deliver reliable stacking strength for mid-size orders. Ships flat in bundles of 15 to maximize warehouse storage and reduce freight costs. The trusted choice for fulfillment centers and warehouse operations.
Boxes - Corrugated

24x14x20 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 241420

24 x 14 x 20 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$58.93 / BUNDLE
IN STOCK Industrial-grade 24x14x18 corrugated shipping boxes made from ECT-32 kraft material designed for reliable performance in high-volume fulfillment operations. Each bundle contains 10 boxes, offering cost-efficient packaging solutions for warehouses and distribution centers. Fully recyclable kraft construction meets sustainability standards while maintaining structural integrity.
Boxes - Corrugated

24x14x18 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 241418

24 x 14 x 18 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$35.02 / BUNDLE
IN STOCK ECT-48 rated double wall corrugated cartons deliver maximum protection and stacking performance for demanding warehouse environments. These 24 x 14 x 14" kraft shipping boxes combine superior crush resistance with efficient flat-ship storage, sold in bundles of 10 to reduce per-unit costs.
Boxes - Corrugated

24x14x14 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD241414DW

24 x 14 x 14 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$72.46 / BUNDLE
IN STOCK Heavy-duty ECT-48 kraft double wall corrugated boxes designed for maximum protection and stacking performance. 24" x 14" x 12" dimensions optimize freight efficiency and warehouse storage. Bundle of 15 ships flat, reducing freight costs and on-site storage space.
Boxes - Corrugated

24x14x12 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD241412DW

24 x 14 x 12 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$116.44 / BUNDLE
IN STOCK Dependable 24x14x12 corrugated shipping boxes built from ECT-32 kraft material for reliable stacking and protection. Each bundle includes 20 boxes–ideal for medium-volume fulfillment operations. Recyclable kraft construction reduces waste while maximizing storage efficiency.
Boxes - Corrugated

24x14x12 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 241412

24 x 14 x 12 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$55.30 / BUNDLE
IN STOCK Standard-strength ECT-32 kraft corrugated boxes in 22x18x18" dimensions, sold as a convenient 15-pack bundle. Engineered for reliable stacking performance and maximum freight efficiency in warehouse and fulfillment operations. Fully recyclable kraft construction reduces environmental impact while meeting your shipping needs.
Boxes - Corrugated

22x18x18 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 221818

22 x 18 x 18 in ECT-32 Corrugated 15 PER BUNDLE
$97.67 / BUNDLE
IN STOCK ECT-32 single-wall corrugated boxes measuring 22" × 16" × 14" deliver reliable strength for mid-weight shipping and storage applications. This bundle of 20 kraft cartons ships flat, cutting warehouse footprint and freight costs without sacrificing stacking performance or durability.
Boxes - Corrugated

22x16x14 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 221614

22 x 16 x 14 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$82.63 / BUNDLE
IN STOCK 20x18x12 Double Wall Corrugated Shipping Boxes w/ Hand Holes, 160 Pack Pallet, 48 ECT
Boxes - Corrugated

20x18x12 ECT-48 Double Wall Corrugated Shipping Boxes w/ Hand Holes 10-Pack

PN: HD201812DWHH

20 x 18 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$69.58 / BUNDLE

Product Help Request

Send the SKU, quantity, delivery ZIP, and any required specs so we can route the request.

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 ->