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 Industrial-grade 18x16x14 double wall corrugated boxes with ECT-48 strength rating–built for demanding fulfillment and warehouse operations. Kraft construction maximizes durability while flat-ship design cuts storage footprint by up to 80%. Bundle of 15 boxes ready for immediate deployment.
Boxes - Corrugated

18x16x14 ECT-48 Kraft Heavy Duty Corrugated Double Wall Shipping Boxes 15-Pack

PN: HD181614DW

18 x 16 x 14 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$115.49 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes measuring 18" × 16" × 8" deliver reliable standard strength for mid-weight products and fulfillment operations. Each bundle includes 25 boxes, reducing per-unit costs while maintaining consistent stacking performance and freight efficiency. Fully recyclable and ready to ship.
Boxes - Corrugated

18x16x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 18168

18 x 16 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$62.98 / BUNDLE
IN STOCK These 18" x 16" x 6" shallow-depth corrugated boxes are engineered for efficient packing of apparel, books, frames, and artwork. Built from ECT-32 kraft corrugated material for reliable protection during transit. Ships flat in bundles of 25 to maximize warehouse space and reduce freight costs.
Boxes - Corrugated

18x16x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 18166

18 x 16 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$52.39 / BUNDLE
IN STOCK Scored multi-depth corrugated boxes that fold to three different heights–no carton sizer needed. Engineered with ECT-32 kraft single-wall construction for strength and cost efficiency. Consolidate inventory, right-size every shipment, and lower parcel service fees with one versatile box.
Boxes - Corrugated

17x17x17 ECT-32 Multi-Depth Kraft Corrugated Shipping Boxes 25-Pack

PN: MD171717

17 x 17 x 17 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$77.13 / BUNDLE
IN STOCK Versatile 17x17x17 cube boxes manufactured from durable ECT-32 single-wall kraft corrugated material. Engineered to handle round, cylindrical, and irregularly shaped products with excellent stacking performance. Sold as convenient 25-box bundles to maximize your packaging efficiency and reduce freight costs.
Boxes - Corrugated

17x17x17 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 171717

17 x 17 x 17 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$79.89 / BUNDLE
IN STOCK ECT-32 kraft corrugated shipping boxes sized 17" x 17" x 10" deliver reliable mid-weight protection at standard strength. Sold as a bundle of 25 units to maximize freight efficiency and reduce per-unit costs. Fully recyclable and built for warehouse-scale operations.
Boxes - Corrugated

17x17x10 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 171710

17 x 17 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$63.71 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes in 17x17x9" dimensions, sold as a bundle of 25. These industry-standard shipping cartons ship and store flat, maximizing your warehouse space while delivering reliable protection for mid-sized products. Perfect for fulfillment centers managing high-volume operations.
Boxes - Corrugated

17x17x9 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 17179

17 x 17 x 9 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$96.00 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 16" × 16" × 18" deliver dependable mid-range protection for standard industrial shipments. Each 25-box bundle offers consistent stacking performance and freight efficiency without premium pricing. Fully recyclable cardboard construction meets sustainability requirements.
Boxes - Corrugated

16x16x18 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 161618

16 x 16 x 18 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$74.69 / BUNDLE
IN STOCK Professional-grade 16x16x16 triple wall corrugated boxes rated ECT-90 for maximum stacking strength and freight efficiency. These heavy-duty kraft cartons collapse flat for compact warehouse storage and ship in bundles of 5. Trusted by fulfillment centers nationwide for demanding applications.
Boxes - Corrugated

16x16x16 ECT-90 Triple Wall Corrugated Boxes 5-Pack

PN: HD161616TW

16 x 16 x 16 in TW/ECT-90 Corrugated 5 PER BUNDLE
$189.34 / BUNDLE
IN STOCK Dependable 14x14x20 corrugated boxes engineered for mid-weight industrial shipping. ECT-32 kraft construction delivers consistent stacking strength and freight efficiency. Recyclable corrugated cartons sold in convenient 20-box bundles–reduce per-unit costs with volume purchasing.
Boxes - Corrugated

14x14x20 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 141420

14 x 14 x 20 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$52.59 / BUNDLE
IN STOCK 10x10x24 ECT-32 Kraft Corrugated Boxes - Bundle of 25
Boxes - Corrugated

10x10x24 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 101024

10 x 10 x 24 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$47.61 / BUNDLE
IN STOCK Heavy-duty 4x4x30 tall corrugated boxes made from ECT-32 kraft for secure shipping of long items like fishing rods, shelving, and trophies. End-loading design enables quick packing and sealing. Sold flat in bundles of 25 to maximize warehouse efficiency and reduce freight costs.
Boxes - Corrugated

4x4x30 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 4430

4 x 4 x 30 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$39.72 / BUNDLE
IN STOCK ECT-32 kraft corrugated side loading boxes in 28x5x24" dimensions–the industry standard for high-volume fulfillment operations. Ships flat in bundles of 10 to maximize warehouse space and reduce freight costs. Engineered for reliable stacking performance and efficient pallet utilization.
Boxes - Corrugated

28x5x24 ECT-32 Kraft Side Loading Boxes 10-Pack

PN: 28524FOL

28 x 5 x 24 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$46.96 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes designed for warehouse managers and fulfillment directors who need maximum protection and stacking performance. These 20" x 14" x 10" kraft cartons ship flat to reduce storage footprint and freight costs–sold as a convenient bundle of 15 boxes.
Boxes - Corrugated

20x14x10 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD201410DW

20 x 14 x 10 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$84.84 / BUNDLE
IN STOCK Industrial-grade ECT-48 double wall corrugated boxes designed for maximum protection and stacking strength. These 17x17x17" kraft cartons ship flat to minimize storage footprint and freight costs. Ideal for warehouses and fulfillment centers requiring reliable heavy-duty shipping solutions.
Boxes - Corrugated

17x17x17 ECT-48 Heavy Duty Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD171717DW

17 x 17 x 17 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$88.57 / BUNDLE
IN STOCK ECT-32 kraft corrugated side loading boxes engineered for fast, efficient product insertion. Each 30x5x24" carton features full overlap (FOL) flaps for maximum protection and stacking strength. Ships flat in bundles of 10 to maximize storage and freight efficiency.
Boxes - Corrugated

30x5x24 ECT-32 Kraft Full Overlap Side Loading Boxes 10-Pack

PN: 30524FOL

30 x 5 x 24 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$34.82 / 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 ->