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-48 rated heavy-duty double wall cartons built for demanding warehouse operations. These 16x14x10 kraft corrugated boxes deliver superior protection and stacking performance for mid-sized freight. Ships flat in bundles of 15 to maximize storage efficiency and reduce logistics costs.
Boxes - Corrugated

16x14x10 ECT-48 Kraft Double Wall Corrugated Shipping Box 15-Pack

PN: HD161410DW

16 x 14 x 10 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$84.99 / BUNDLE
IN STOCK Heavy-duty 15x15x15 corrugated boxes engineered for maximum stacking strength and freight efficiency. ECT-44 single wall kraft construction delivers 40% greater protection than standard shipping cartons. Sold flat in convenient bundles of 25.
Boxes - Corrugated

15x15x15 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 25-Pack

PN: HD151515

15 x 15 x 15 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$147.57 / BUNDLE
IN STOCK Cut inventory complexity and freight costs with these 15x15x15 multi-depth corrugated boxes. Pre-scored sides fold to fit 6 different heights–no carton sizer needed. ECT-32 kraft corrugated provides reliable stacking strength while consolidating multiple box sizes into one SKU.
Boxes - Corrugated

15x15x15 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 25-Pack

PN: MD151515

15 x 15 x 15 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$65.78 / BUNDLE
IN STOCK 15x15x15 Kraft Corrugated Shipping Boxes, 525 Pack Pallet, 32 ECT
Boxes - Corrugated

15x15x15 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 151515

15 x 15 x 15 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$54.36 / BUNDLE
IN STOCK Industrial-grade ECT-48 double wall corrugated boxes engineered for heavy-duty shipping and storage. 15x15x10 kraft cartons with superior stacking strength and crush resistance. Ships flat in bundles of 15–maximize warehouse efficiency and reduce freight spend.
Boxes - Corrugated

15x15x10 ECT-48 Double Wall Corrugated Boxes 15-Pack

PN: HD151510DW

15 x 15 x 10 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$95.88 / BUNDLE
IN STOCK Reliable ECT-32 kraft corrugated boxes in 15x15x10 dimensions–ideal for mid-weight shipping, storage, and fulfillment operations. Single-wall construction delivers strength at competitive cost. Sold in bundles of 20 to maximize your warehouse efficiency and reduce per-unit packaging costs.
Boxes - Corrugated

15x15x10 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 151510

15 x 15 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$42.09 / BUNDLE
IN STOCK Industrial-grade 14x14x14" triple wall corrugated boxes with ECT-90 rating deliver maximum crush and stacking strength for high-volume fulfillment operations. Kraft material ships flat to optimize warehouse storage and freight costs. Bundle of 5 boxes reduces per-unit pricing and simplifies reorder management.
Boxes - Corrugated

14x14x14 ECT-90 Triple Wall Corrugated Boxes 5-Pack

PN: HD141414TW

14 x 14 x 14 in TW/ECT-90 Corrugated 5 PER BUNDLE
$115.47 / BUNDLE
IN STOCK Heavy-duty 13x13x17 corrugated shipping boxes with ECT-32 single-wall construction deliver industry-standard durability for mid-size shipments. Flat-ship design reduces storage footprint and freight costs. Bundle of 25 kraft cartons ready to stock your warehouse.
Boxes - Corrugated

13x13x17 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 131317

13 x 13 x 17 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$77.14 / BUNDLE
IN STOCK Multi-depth corrugated boxes that fold to your exact size–no carton sizer required. Pre-scored sides let you adjust height for perfect fit, reducing dimensional weight charges and inventory SKUs. ECT-32 kraft construction delivers reliable protection. Bundle of 25.
Boxes - Corrugated

12x12x18 ECT-32 Kraft Adjustable Multi-Depth Corrugated Shipping Box 25-Pack

PN: MD121218

12 x 12 x 18 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$51.32 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 12" × 12" × 18" deliver dependable single-wall strength for mid-weight shipping and storage applications. Sold as a convenient bundle of 25 cartons, these standard-strength cardboard boxes maximize freight efficiency and reduce per-unit packaging costs. 100% recyclable kraft construction.
Boxes - Corrugated

12x12x18 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 121218

12 x 12 x 18 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$50.43 / BUNDLE
IN STOCK 10x10x20 ECT-32 Kraft Corrugated Boxes - Tall Shipping, 25-Pack
Boxes - Corrugated

10x10x20 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 25-Pack

PN: 101020

10 x 10 x 20 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$43.60 / BUNDLE
IN STOCK ECT-44 kraft corrugated side loading boxes engineered for high-volume fulfillment operations. 24" × 6" × 18" dimensions nest flat for 60% storage savings and fast deployment. Industry-standard stacking strength rated for 44 ECT–handle full pallets with confidence.
Boxes - Corrugated

24x6x18 ECT-44 Kraft Side Loading Boxes 10-Pack

PN: HD24618FOL

24 x 6 x 18 in ECT-44 Corrugated 10 PER BUNDLE
$63.27 / BUNDLE
IN STOCK ECT-48 heavy-duty double wall corrugated boxes engineered for maximum protection and stacking performance. These 24" x 6" x 6" kraft cartons deliver superior burst strength and crush resistance–ideal for high-volume fulfillment operations. Bundle of 15 ships flat to maximize warehouse efficiency and reduce freight costs.
Boxes - Corrugated

24x6x6 ECT-48 Kraft Heavy Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD2466DW

24 x 6 x 6 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$44.93 / BUNDLE
IN STOCK Ship tall items safely with these 6x6x24" ECT-32 kraft corrugated boxes. End-loading design speeds packing and sealing. Bundle of 25 boxes ships flat for space-efficient storage–ideal for warehouses and fulfillment centers handling trophies, fishing rods, shelving, and similar long products.
Boxes - Corrugated

6x6x24 ECT-32 Kraft Corrugated Boxes 25-Pack

PN: 6624

6 x 6 x 24 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$32.86 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes sized 17" × 14" × 12" for mid-weight products and efficient warehouse operations. Sold as a bundle of 25 units with superior stacking performance and recyclable kraft construction. Standard strength design optimized for freight consolidation and cost-per-box savings.
Boxes - Corrugated

17x14x12 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 171412

17 x 14 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$55.08 / BUNDLE
IN STOCK ECT-48 double wall construction delivers superior crushing strength and stacking performance for demanding fulfillment operations. These 15x15x15 kraft corrugated boxes ship flat in bundles of 15, reducing warehouse footprint and freight costs by up to 40% versus assembled cartons. Ideal for mid-weight products, e-commerce fulfillment, and high-volume distribution.
Boxes - Corrugated

15x15x15 ECT-48 Double Wall Corrugated Boxes 15-Pack

PN: HD1515DW

15 x 15 x 15 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$65.16 / 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 ->