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 Engineered for height-critical shipments: ECT-48 double wall telescoping outer cartons with adjustable two-piece design fit tall and irregular products precisely. FOL reinforced bottom delivers superior stacking strength. Bundle of 15 kraft corrugated boxes ready to pair with matching inner cartons.
Boxes - Corrugated

8.75x8.75x48 ECT-48 Double Wall Telescoping Outer Boxes 15-Pack

PN: T8848OUTERDW

8 3/4 x 8 3/4 x 48 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$154.04 / BUNDLE
IN STOCK Ship or store garments directly on hangers with zero rehandling. These 36" x 21" x 10" kraft corrugated boxes feature ECT-32 single-wall construction with pre-printed up arrows and write-on delivery panels. Sold as a 10-pack bundle for maximum freight efficiency.
Boxes - Corrugated

36x21x10 ECT-32 Kraft Wardrobe Box 10-Pack

PN: 362110

36 x 21 x 10 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$84.67 / BUNDLE
IN STOCK Consolidate multiple shipments with these 36x22x22 double wall corrugated boxes engineered for heavy loads. ECT-51 kraft construction delivers superior stacking strength and compression resistance for bulky, irregularly shaped items. Sold as a bundle of 5 cartons.
Boxes - Corrugated

36x22x22 ECT-51 Double Wall Corrugated Boxes 5-Pack

PN: AF362222

36 x 22 x 22 in ECT-51 Double Wall Corrugated 5 PER BUNDLE
$70.66 / BUNDLE
IN STOCK Industrial-grade ECT-44 single wall corrugated side loading boxes sized 18" × 6" × 45" for tall, narrow products. Bundle of 5 ships flat to minimize storage footprint and freight costs. Kraft construction meets stringent stacking and compression standards for demanding warehouse environments.
Boxes - Corrugated

18x6x45 ECT-44 Kraft Side Loading Boxes 5-Pack

PN: HD18645FOL

18 x 6 x 45 in ECT-44 Single Wall Corrugated 5 PER BUNDLE
$61.34 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes sized 9x9x48" for tall product storage and shipping. Ship and store flat to maximize warehouse efficiency. Bundle of 20 boxes reduces per-unit cost and freight spend.
Boxes - Corrugated

9x9x48 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 9948

9 x 9 x 48 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$104.50 / BUNDLE
IN STOCK Maximize your warehouse efficiency with this 58x41x45" double wall corrugated box (ECT-51). Designed for consolidating multiple piece shipments and protecting bulky, irregularly shaped items, this heavy-duty carton reduces freight costs and improves stacking performance. Removable panels make packing and unpacking fast–perfect for high-volume fulfillment operations.
Boxes - Corrugated

58x41x45 ECT-51 Double Wall Corrugated Box

PN: AF584145

58 x 41 x 45 in ECT-51 Double Wall Corrugated 1 PER BUNDLE
$122.76 / BUNDLE
IN STOCK ECT-32 kraft corrugated long boxes designed for efficient packing of elongated items like wine bottles, umbrellas, and carpet rolls. The 48" length with 10" x 10" cross-section and long-side opening maximizes accessibility and reduces packing time. Sold in bundles of 20, flat for freight efficiency.
Boxes - Corrugated

48x10x10 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 481010

48 x 10 x 10 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$104.61 / BUNDLE
IN STOCK 40x18x8" corrugated boxes featuring ECT-32 single wall kraft construction deliver reliable strength for mid-weight shipments. Sold in bundles of 10, these kraft cartons maximize warehouse efficiency and stacking performance while reducing freight costs. Fully recyclable and ideal for e-commerce fulfillment and distribution centers.
Boxes - Corrugated

40x18x8 ECT-32 Kraft Corrugated Shipping Boxes 10-Pack

PN: 40188

40 x 18 x 8 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$45.84 / BUNDLE
IN STOCK Adjustable two-piece telescoping inner boxes designed for tall and irregularly shaped items. 18" × 18" × 40" dimensions in ECT-32 kraft corrugated with full overlap bottom for added strength. Sold in bundles of 10–pair with T181840OUTER to complete your shipping solution.
Boxes - Corrugated

18x18x40 ECT-32 Kraft Telescoping Inner Box 10-Pack

PN: T181840INNER

18 x 18 x 40 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$139.94 / BUNDLE
IN STOCK 10x10x48 ECT-32 Kraft Telescoping Inner Box - Adjustable Tall Carton, 20-Pack
Boxes - Corrugated

10x10x48 ECT-32 Kraft Telescoping Inner Box 20-Pack

PN: T101048INNER

10 x 10 x 48 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$83.85 / BUNDLE
IN STOCK Industrial-grade 30x30x25 corrugated shipping boxes with ECT-32 single-wall kraft construction deliver reliable stacking strength for high-volume fulfillment operations. Each bundle includes 5 boxes–optimize your freight efficiency and reduce per-unit packaging costs. Fully recyclable kraft material meets sustainability standards.
Boxes - Corrugated

30x30x25 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 5-Pack

PN: 303025

30 x 30 x 25 in ECT-32 Single Wall Corrugated 5 PER BUNDLE
$47.55 / BUNDLE
IN STOCK 10x10x48 ECT-32 Kraft Corrugated Boxes - Bundle of 20
Boxes - Corrugated

10x10x48 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 101048

10 x 10 x 48 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$74.49 / BUNDLE
IN STOCK Heavy-duty 8x8x50 corrugated boxes built from ECT-32 kraft material for shipping tall, fragile items like trophies, shelving units, and fishing rods. End-loading design enables fast, secure sealing. Sold as a bundle of 20 boxes–ships flat to maximize freight efficiency and storage space.
Boxes - Corrugated

8x8x50 ECT-32 Kraft Corrugated Shipping Boxes 20-Pack

PN: 8850

8 x 8 x 50 in ECT-32 Single Wall Corrugated 20 PER BUNDLE
$130.23 / BUNDLE
IN STOCK Heavy-duty 36x5x48 side loading boxes with ECT-44 single wall corrugated construction deliver reliable stacking performance and freight efficiency. Kraft material ships and stores flat, reducing warehouse footprint by up to 70%. Bundle of 5 boxes–the industry standard for fulfillment operations managing high-volume SKUs.
Boxes - Corrugated

36x5x48 ECT-44 Kraft Side Loading Boxes 5-Pack

PN: 36548FOL

36 x 5 x 48 in ECT-44 Single Wall Corrugated 5 PER BUNDLE
$73.40 / BUNDLE
IN STOCK Heavy-duty 22x22x36 corrugated boxes built with ECT-32 single wall kraft material for superior stacking strength and freight efficiency. End-loading design enables fast packing and sealing of tall items including shelving, trophies, and fishing rods. Sold flat in convenient bundles of 10 to maximize warehouse storage.
Boxes - Corrugated

22x22x36 ECT-32 Kraft Corrugated Heavy Duty Shipping Boxes 10-Pack

PN: 222236

22 x 22 x 36 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$74.27 / BUNDLE
IN STOCK Adjustable two-piece telescoping outer boxes built for tall and irregularly shaped shipments. 18.5×18.5×40" dimensions with ECT-32 kraft corrugated construction and reinforced FOL bottom provide superior stacking performance and freight stability. Sold in bundles of 10–pair with matching inner carton (T181840INNER) to complete your packaging solution.
Boxes - Corrugated

18.5x18.5x40 ECT-32 Kraft Telescoping Outer Boxes 10-Pack

PN: T181840OUTER

18 1/2 x 18 1/2 x 40 in ECT-32 Single Wall Corrugated 10 PER BUNDLE
$145.01 / BUNDLE

Product Help Request

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Buying path

Buy Boxes & Mailers by the specs that change the order

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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 ->