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-44 heavy-duty multi-depth kraft corrugated boxes in 24x24x24 dimensions eliminate empty space and reduce dimensional weight surcharges. Pre-scored sides let you adjust box size without inventory clutter. 40% stronger than standard shipping cartons–built for warehouse efficiency and maximum stacking performance.
Boxes - Corrugated

24x24x24 ECT-44 Kraft Heavy-Duty Multi-Depth Corrugated Shipping Boxes 10-Pack

PN: MDHD242424

24 x 24 x 24 in ECT-44 Single Wall Corrugated 10 PER BUNDLE
$87.42 / BUNDLE
IN STOCK Premium 24x24x24 white corrugated cube boxes with ECT-32 strength–ideal for branded shipments and custom labeling. This 10-pack bundle delivers heavy-duty stacking performance with a pristine white finish that makes labels and shipping instructions stand out. Same durability as kraft cartons at a fraction of the cost.
Boxes - Corrugated

24x24x24 ECT-32 White Corrugated Shipping Boxes 10-Pack

PN: 242424W

24 x 24 x 24 in ECT-32 Corrugated 10 PER BUNDLE
$91.69 / BUNDLE
IN STOCK Pre-scored multi-depth corrugated boxes that fold to your exact specifications without a carton sizer–eliminating one SKU and cutting freight costs. Built from ECT-32 kraft for strength and durability. Bundle of 10 boxes reduces your per-unit price while standardizing your packaging inventory.
Boxes - Corrugated

24x24x24 ECT-32 Kraft Adjustable Multi-Depth Corrugated Shipping Boxes 10-Pack

PN: MD242424

24 x 24 x 24 in ECT-32 Corrugated 10 PER BUNDLE
$62.50 / BUNDLE
IN STOCK Ship odd-shaped and cylindrical products safely with these 24x24x24 cube boxes engineered from ECT-32 kraft corrugated material. Each box offers 8 cubic feet of capacity–a standard footprint that maximizes pallet efficiency and freight savings. Sold in convenient bundles of 10 for streamlined inventory management.
Boxes - Corrugated

24x24x24 ECT-32 Kraft Corrugated Cube Shipping Box 10-Pack

PN: 242424

24 x 24 x 24 in ECT-32 Corrugated 10 PER BUNDLE
$56.67 / BUNDLE
IN STOCK Heavy-duty ECT-48 kraft double wall corrugated boxes designed for demanding warehouse and fulfillment operations. 24" × 24" × 18" dimensions deliver maximum protection for fragile and heavy items while minimizing dimensional weight charges. Sold in bundles of 10 and ship flat to maximize storage efficiency and reduce freight costs.
Boxes - Corrugated

24x24x18 ECT-48 Double Wall Corrugated Boxes 10-Pack

PN: HD242418DW

24 x 24 x 18 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$100.56 / BUNDLE
IN STOCK ECT-48 double wall corrugated boxes engineered for maximum stacking strength and freight efficiency. These 24x24x12 kraft cartons feature integrated hand holes for easy handling and ship flat to reduce warehouse storage footprint. Bundle of 10 heavy-duty boxes per unit.
Boxes - Corrugated

24x24x12 ECT-48 Double Wall Corrugated Boxes with Hand Holes 10-Pack

PN: HD242412DWHH

24 x 24 x 12 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$103.00 / BUNDLE
IN STOCK Ship with confidence using these heavy-duty 24x24x8 double wall corrugated boxes rated ECT-48 for maximum protection and stacking performance. Manufactured from kraft material and sold in bundles of 10, these shipping cartons arrive flat to maximize your warehouse storage and reduce freight costs. Ideal for fulfillment centers and warehouse managers who demand durability without compromising efficiency.
Boxes - Corrugated

24x24x8 ECT-48 Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD24248DW

24 x 24 x 8 in D.W./ECT-48 Corrugated 10 PER BUNDLE
$104.06 / BUNDLE
IN STOCK ECT-48 double wall kraft corrugated boxes engineered for maximum stacking strength and freight efficiency. These 24x24x6 shipping cartons deliver superior protection for mid-weight to heavy products without compromising warehouse storage space. Bundle of 10 boxes ships flat–minimize receiving footprint and reduce packaging costs.
Boxes - Corrugated

24x24x6 ECT-48 Kraft Double Wall Boxes 10-Pack

PN: HD24246DW

24 x 24 x 6 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$87.53 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes designed for shallow products that demand reliable protection without excess depth. These 24x24x6" flat boxes ship compressed to maximize warehouse density and cut freight spend. 2.0 cubic feet per carton–10-box bundle.
Boxes - Corrugated

24x24x6 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 24246

24 x 24 x 6 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$44.41 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 20" x 20" x 28" deliver standard strength performance for mid-weight shipping and storage applications. Sold as a convenient bundle of 10, these recyclable cardboard cartons maximize freight efficiency and reduce per-unit packaging costs for warehouse and fulfillment operations.
Boxes - Corrugated

20x20x28 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 202028

20 x 20 x 28 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$72.98 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 18" × 18" × 30" for shipping tall, rigid items like shelving, trophies, and fishing rods. Strong single-wall construction with end-loading design for fast packing and sealing. Sold flat in bundles of 10 for maximum storage efficiency.
Boxes - Corrugated

18x18x30 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 181830

18 x 18 x 30 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$63.81 / BUNDLE
IN STOCK 12x12x36 Kraft Corrugated Shipping Boxes, 330 Pack Pallet, 32 ECT
Boxes - Corrugated

12x12x36 ECT-32 Kraft Corrugated Shipping Boxes 15-Pack

PN: 121236

12 x 12 x 36 in ECT-32 Single Wall Corrugated 15 PER BUNDLE
$52.31 / BUNDLE
IN STOCK 10x10x38" ECT-32 Kraft Corrugated Boxes - Bundle of 25
Boxes - Corrugated

10x10x38 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 101038

10 x 10 x 38 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$72.83 / BUNDLE
IN STOCK Ship tall items efficiently with ECT-32 kraft corrugated boxes designed for end-loading. Each bundle contains 20 boxes measuring 8" × 8" × 40", offering strong single-wall protection for trophies, shelving, fishing rods, and industrial goods. Sold flat for maximum freight efficiency and warehouse space savings.
Boxes - Corrugated

8x8x40 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 8840

8 x 8 x 40 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$52.76 / BUNDLE
IN STOCK ECT-44 kraft side loading boxes designed for end-access loading of fragile or awkward products. 36"L × 6"W × 36"H dimensions with full overlap flaps deliver maximum edge protection and stacking strength. Ships flat in bundles of 10 to minimize your storage footprint and freight costs.
Boxes - Corrugated

36x6x36 ECT-44 Kraft Side Loading Box 10-Pack

PN: HD36636FOL

36 x 6 x 36 in ECT-44 Corrugated 10 PER BUNDLE
$143.20 / BUNDLE
IN STOCK Maximize vertical storage while minimizing freight costs with these 28" × 5" × 38" ECT-32 kraft side loading corrugated boxes. Engineered for tall, narrow products, they ship and store completely flat–cutting your warehouse footprint by up to 40%. Bundle of 20 boxes.
Boxes - Corrugated

28x5x38 ECT-32 Kraft Side Loading Boxes 20-Pack

PN: 28538FOL

28 x 5 x 38 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$132.04 / BUNDLE

Product Help Request

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Buying path

Buy Boxes & Mailers by the specs that change the order

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Compare

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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 ->