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 sized 22" x 12" x 12" for mid-weight industrial shipping and storage applications. This bundle of 20 delivers proven stacking strength and freight efficiency for warehouse operations. Recyclable kraft construction reduces environmental impact while maintaining reliable performance.
Boxes - Corrugated

22x12x12 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 221212

22 x 12 x 12 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$45.62 / BUNDLE
IN STOCK Durable ECT-32 single wall kraft corrugated boxes in 22x12x10" dimensions, sold as a bundle of 20 units. Built for reliable stacking performance and freight efficiency in high-volume warehouse operations. 100% recyclable cardboard construction.
Boxes - Corrugated

22x12x10 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 221210

22 x 12 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$43.10 / BUNDLE
IN STOCK 22x12x8 Kraft Corrugated Shipping Boxes, 350 Pack Pallet, 32 ECT
Boxes - Corrugated

22x12x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 22128

22 x 12 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$81.75 / BUNDLE
IN STOCK Warehouse-tested 21x13x13 corrugated shipping boxes in ECT-32 kraft construction–the industry standard for mid-size product fulfillment. Each bundle of 20 ships and stores flat to maximize your warehouse space and reduce freight costs. Perfect for e-commerce, retail, and logistics operations.
Boxes - Corrugated

21x13x13 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 211313

21 x 13 x 13 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$76.55 / BUNDLE
IN STOCK Heavy-duty ECT-32 single wall corrugated boxes in 20x14x18" dimensions, sold as a convenient bundle of 20. Perfect for mid-weight product shipping and warehouse storage with proven stacking strength. Kraft brown construction offers excellent freight efficiency and full recyclability.
Boxes - Corrugated

20x14x18 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 201418

20 x 14 x 18 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$59.96 / BUNDLE
IN STOCK Industrial-grade ECT-32 kraft corrugated shipping boxes in 20x14x16" dimensions. Each bundle includes 20 boxes built for reliable stacking performance and freight efficiency. Recyclable cardboard construction ideal for warehouse, fulfillment, and storage operations.
Boxes - Corrugated

20x14x16 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 201416

20 x 14 x 16 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$56.14 / BUNDLE
IN STOCK Eliminate multiple SKUs with one versatile 20x14x14 pre-scored corrugated box that folds to three different heights–perfect for warehouse managers cutting packaging inventory and parcel costs. ECT-32 kraft material delivers strength without carton sizers. Sold as a bundle of 15 boxes.
Boxes - Corrugated

20x14x14 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 15-Pack

PN: MD201414

20 x 14 x 14 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$46.34 / BUNDLE
IN STOCK Heavy-duty ECT-32 kraft corrugated boxes sized 20" × 14" × 14" for reliable shipping, storage, and fulfillment operations. This bundle of 20 boxes delivers standard industrial strength at volume pricing. Recyclable kraft construction maximizes sustainability while minimizing freight costs.
Boxes - Corrugated

20x14x14 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 201414

20 x 14 x 14 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$53.36 / BUNDLE
IN STOCK Dependable ECT-32 single-wall corrugated shipping boxes in 20" × 14" × 8" dimensions, bundled 25-pack for cost-efficient bulk purchasing. Kraft construction delivers standard-strength protection for mid-weight products and e-commerce fulfillment. Fully recyclable and warehouse-ready.
Boxes - Corrugated

20x14x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 20148

20 x 14 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$52.39 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes sized 20" x 14" x 6" with shallow depth for right-sized product fit and reduced dimensional weight charges. Engineered for apparel, books, frames, and artwork. Ships flat in bundles of 25–maximize warehouse storage and cut freight costs.
Boxes - Corrugated

20x14x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 20146

20 x 14 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$45.84 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 20" × 14" × 4" deliver reliable protection for shallow items at minimal freight cost. Ships flat in bundles of 25 to maximize warehouse efficiency and reduce shipping overhead. Perfect for apparel, books, artwork, and small goods requiring secure containment.
Boxes - Corrugated

20x14x4 ECT-32 Kraft Corrugated Shipping Boxes Single Wall 25-Pack

PN: 20144

20 x 14 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$43.12 / BUNDLE
IN STOCK Shallow-depth 20x14x3" corrugated cartons engineered for efficient shipping of apparel, books, artwork, and picture frames. ECT-32 kraft construction delivers reliable protection while ships flat to maximize warehouse storage. Bundle of 25 boxes per pack.
Boxes - Corrugated

20x14x3 ECT-32 Kraft Corrugated Boxes 25-Pack

PN: 20143

20 x 14 x 3 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$54.84 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes built for high-volume shipping and storage operations. These 18" x 16" x 14" cartons deliver reliable stacking strength and freight efficiency in bundles of 25. Trusted by warehouse managers and fulfillment directors for consistent performance.
Boxes - Corrugated

18x16x14 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 181614

18 x 16 x 14 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$70.92 / BUNDLE
IN STOCK ECT-32 single-wall corrugated construction delivers dependable protection for mid-sized shipments. These 18" x 16" x 12" kraft boxes handle standard warehouse stacking and freight loads efficiently. Sold as a 25-pack bundle for consistent inventory and volume savings.
Boxes - Corrugated

18x16x12 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 181612

18 x 16 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$66.70 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 18" x 16" x 10" deliver dependable single-wall strength for mid-weight industrial shipping. Each bundle contains 20 boxes, reducing per-unit cost and simplifying your inventory. Perfect for fulfillment centers and warehouse operations seeking reliable cardboard cartons without premium pricing.
Boxes - Corrugated

18x16x10 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 181610

18 x 16 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$48.59 / BUNDLE
IN STOCK 18x16x4 Kraft Corrugated Shipping Boxes, 600 Pack Pallet, 32 ECT
Boxes - Corrugated

18x16x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 18164

18 x 16 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$47.26 / 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

Use filters and product titles to narrow by the specs that affect fit.

Confirm

Open the product page before ordering a case so you can check quantity, unit, and limits.

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 ->