Boxes & Mailers

SELECTION EXPERT ADVICE

Wall Strength & Load Capacity
MORE INFO
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
MORE INFO
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
MORE INFO
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 24x12x24 Kraft Corrugated Shipping Boxes, 290 Pack Pallet, 32 ECT
Boxes - Corrugated

24x12x24 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 241224

24 x 12 x 24 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$38.48 / BUNDLE
IN STOCK ECT-48 double wall corrugated cartons engineered for maximum protection and stacking performance. These 24x12x12 kraft boxes handle high-volume fulfillment with rated strength for multi-tier warehouse storage. Bundle of 15 ships flat–reducing storage footprint and freight costs.
Boxes - Corrugated

24x12x12 ECT-48 Kraft Heavy-Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD241212DW

24 x 12 x 12 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$53.44 / BUNDLE
IN STOCK ECT-48 double wall corrugated boxes engineered for maximum protection and stacking performance. These 20" × 16" × 14" heavy-duty kraft cartons deliver superior crush resistance and puncture protection for demanding warehouse operations. Bundle of 15 ships flat to maximize freight efficiency and minimize storage footprint.
Boxes - Corrugated

20x16x14 ECT-48 Heavy Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD201614DW

20 x 16 x 14 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$75.05 / BUNDLE
IN STOCK Engineered for high-performance storage and shipping, these 18x18x18 corrugated boxes feature V3c 350# single-wall construction with water-resistant adhesive (WRA) for superior equipment protection. Military-specification rated, sold in bundles of 10 kraft boxes to maximize freight efficiency and reduce per-unit costs.
Boxes - Corrugated

18x18x18 V3c 350# Weather-Resistant Corrugated Boxes 10-Pack

PN: 181818V3C

18 x 18 x 18 in V3c - 350# Single Wall Corrugated 10 PER BUNDLE
$203.58 / BUNDLE
IN STOCK 18x18x16 Kraft Double Wall Corrugated Shipping Boxes, 160 Pack Pallet, 48 ECT
Boxes - Corrugated

18x18x16 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD181816DW

18 x 18 x 16 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$72.73 / BUNDLE
IN STOCK Heavy-duty ECT-71 double wall corrugated boxes designed for maximum stacking performance and freight efficiency in high-volume warehouse environments. 18x18x18" kraft boxes ship and store flat, reducing your storage footprint while maintaining superior puncture and crush resistance. Bundle of 10 delivers immediate cost savings for fulfillment operations.
Boxes - Corrugated

18x18x18 ECT-71 Heavy-Duty Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD181818HDDW

18 x 18 x 18 in ECT-71 Double Wall Corrugated 10 PER BUNDLE
$160.72 / BUNDLE
IN STOCK Professional-grade 18x18x18 corrugated shipping boxes built from ECT-48 double wall kraft material for maximum durability and stacking performance. Integrated hand holes enable efficient manual handling and reduce fulfillment labor. Sold as a bundle of 10 boxes–ideal for warehouse managers requiring heavy-duty protection without sacrificing operational speed.
Boxes - Corrugated

18x18x18 ECT-48 Double Wall Corrugated Shipping Boxes w/ Hand Holes 10-Pack

PN: HD181818DWHH

18 x 18 x 18 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$84.78 / BUNDLE
IN STOCK Heavy-duty ECT-48 double wall corrugated boxes built to protect high-value freight and maximize stacking efficiency in your warehouse. Each bundle includes 10 flat-shipped 18x18x18" kraft cartons, reducing storage footprint while delivering superior burst strength and crush resistance. Ideal for printers, electronics, and mid-sized industrial components.
Boxes - Corrugated

18x18x18 ECT-48 Kraft Heavy Duty Double Wall Corrugated Shipping Boxes 10-Pack

PN: HD1818DW

18 x 18 x 18 in ECT-48 Double Wall Corrugated 10 PER BUNDLE
$54.80 / BUNDLE
IN STOCK Professional-grade ECT-32 kraft corrugated boxes sized 22" × 15" × 15"–engineered for reliable mid-weight shipping and storage. This bundle of 20 brown cardboard boxes delivers consistent stacking strength and freight efficiency for warehouse, fulfillment, and logistics operations. 100% recyclable kraft material.
Boxes - Corrugated

22x15x15 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 221515

22 x 15 x 15 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$64.77 / BUNDLE
IN STOCK ECT-32 kraft corrugated boxes sized 22" × 15" × 10" deliver reliable protection for mid-weight shipments and storage. Ships flat to maximize warehouse space and reduce freight costs. Sold as a bundle of 25 cartons.
Boxes - Corrugated

22x15x10 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 221510

22 x 15 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$105.21 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes sized 21 3/8" x 15 5/8" x 12 5/8" – industry-standard for garment shipments with or without hangers. Bundle of 20 boxes delivers reliable stacking strength and efficient warehouse storage. Cost-effective bulk packaging for high-volume fulfillment operations.
Boxes - Corrugated

21 3/8x15 5/8x12 5/8 ECT-32 Kraft Corrugated Boxes 20-Pack

PN: 211512

21 3/8 x 15 5/8 x 12 5/8 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$83.54 / BUNDLE
IN STOCK Ship apparel efficiently with these 21 3/8 x 15 5/8 x 9 1/2" ECT-32 kraft corrugated boxes, sold in bundles of 20. Designed for garment storage and hanger-accommodating loads. Single-wall construction delivers reliable strength at competitive volume pricing.
Boxes - Corrugated

21 3/8x15 5/8x9 1/2 ECT-32 Kraft Corrugated Boxes 20-Pack

PN: 21159

21 3/8 x 15 5/8 x 9 1/2 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$87.00 / BUNDLE
IN STOCK Durable ECT-32 kraft corrugated boxes sized 18½" × 18½" × 9" for mid-weight product shipping and storage. Single-wall construction delivers reliable stacking performance and freight efficiency. Sold as a bundle of 20 boxes–the standard strength solution for warehouses managing high-volume fulfillment.
Boxes - Corrugated

18.5x18.5x9 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 18189R

18 1/2 x 18 1/2 x 9 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$55.98 / BUNDLE
IN STOCK Adjustable 2-piece telescoping outer boxes engineered for tall and irregularly shaped items. ECT-32 kraft corrugated with full overlap (FOL) bottoms ensures maximum stacking strength and freight stability. Sold in bundles of 10–pair with T30624INNER inner cartons to complete your protective packaging system.
Boxes - Corrugated

30.5x6.5x24 ECT-32 Telescoping Outer Boxes 10-Pack

PN: T30624OUTER

30 1/2 x 6.5 x 24 in ECT-32 Corrugated 10 PER BUNDLE
$57.08 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes measuring 21 3/8" × 15 5/8" × 6 3/8"–optimized for apparel and garment shipping with or without hangers. Each bundle contains 25 boxes, delivering the strength and freight efficiency warehouse managers depend on without excess material costs.
Boxes - Corrugated

21 3/8x15 5/8x6 3/8 ECT-32 Kraft Corrugated Boxes 25-Pack

PN: 21156

21 3/8 x 15 5/8 x 6 3/8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$93.74 / BUNDLE
IN STOCK ECT-90 triple wall corrugated construction delivers industrial-grade protection for high-volume shipping and storage. These 18" cube boxes offer over ½" wall thickness for maximum stacking performance and freight stability. Bundle of 5 heavy-duty cartons ready to ship.
Boxes - Corrugated

18x18x18 ECT-90 Triple Wall Corrugated Boxes 5-Pack

PN: HD181818TW

18 x 18 x 18 in ECT-90 Triple Wall Corrugated 5 PER BUNDLE
$187.43 / 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

Save the SKU or product link for repeat purchasing and support questions.

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 ->