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 Reduce your carton inventory footprint with these pre-scored multi-depth corrugated boxes. Fold to 5 different heights–no sizer equipment required. ECT-32 single-wall kraft construction delivers reliable protection while adjustable sizing cuts parcel and freight costs.
Boxes - Corrugated

14 1/2x8 3/4x12 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: MD14812

14 1/2 x 8.75 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$36.90 / BUNDLE
IN STOCK Pre-scored multi-depth corrugated boxes that fold to your exact needs–no carton sizer required. These 13.25x10.25x12 ECT-32 kraft shipping cartons eliminate inventory bloat by consolidating multiple box sizes into one smart SKU. Bundle of 25 delivers immediate freight and labor savings.
Boxes - Corrugated

13.25x10.25x12 ECT-32 Multi-Depth Kraft Corrugated Shipping Boxes 25-Pack

PN: MD131012

13 1/4 x 10.25 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$41.80 / BUNDLE
IN STOCK ECT-32 single-wall corrugated boxes in 13x10x13" dimensions deliver reliable strength for mid-sized shipments while shipping flat to maximize storage efficiency. Each bundle includes 25 kraft boxes–the industry standard for warehouse operations and fulfillment centers. Perfect for e-commerce, retail, and industrial applications.
Boxes - Corrugated

13x10x13 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 131013

13 x 10 x 13 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$51.60 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes deliver reliable stacking performance for mid-weight shipments. Sized 13.25" x 10.25" x 9" and sold in efficient 25-box bundles, these cardboard shipping boxes reduce freight costs while maintaining structural integrity. Built to meet industrial warehouse demands.
Boxes - Corrugated

13.25x10.25x9 ECT-32 Kraft Corrugated Shipping Boxes

PN: 13109SC

13 1/4 x 10.25 x 9 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$32.25 / BUNDLE
IN STOCK Lightweight yet durable ECT-32 single wall corrugated shipping boxes with integrated self-seal closure and side-load design. 12.5" 3" 17.5" dimensions maximize freight efficiency while flat-shipping format reduces storage footprint by up to 70%. Bundle of 25 boxes ready to deploy.
Boxes - Corrugated

12.5x3x17.5 ECT-32 Self-Seal Side Loading Box 25-Pack

PN: 12317SSFOL

12 1/2 x 3 x 17 1/2 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$127.79 / BUNDLE
IN STOCK 20x4x4 Kraft Corrugated Shipping Boxes, 950 Pack Pallet, 32 ECT
Boxes - Corrugated

20x4x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 2044

20 x 4 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$29.58 / BUNDLE
IN STOCK 18x6x6 Kraft Corrugated Shipping Boxes, 1,150 Pack Pallet, 32 ECT
Boxes - Corrugated

18x6x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1866

18 x 6 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$24.34 / BUNDLE
IN STOCK Ship long and narrow products efficiently with these 18x6x4 kraft corrugated boxes featuring ECT-32 single-wall construction and extended side opening. Perfect for wine bottles, umbrellas, carpet rolls, and similar items. Sold in bundles of 25 and shipped flat for maximum freight efficiency.
Boxes - Corrugated

18x6x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1864

18 x 6 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$21.29 / BUNDLE
IN STOCK Purpose-built 16x8x8 corrugated boxes with long-side openings for effortless packing of elongated products like wine bottles, umbrellas, and carpet rolls. Manufactured from ECT-32 single-wall kraft corrugated material and sold flat in bundles of 25 for maximum freight efficiency and storage savings.
Boxes - Corrugated

16x8x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1688

16 x 8 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$27.12 / BUNDLE
IN STOCK Ship long, narrow items efficiently with these 16x8x6 corrugated boxes featuring wide lengthwise openings for fast packing. ECT-32 kraft construction delivers reliable protection while optimizing freight efficiency. Sold flat in bundles of 25 for maximum storage savings.
Boxes - Corrugated

16x8x6 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1686

16 x 8 x 6 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$23.20 / BUNDLE
IN STOCK Ship shallow products efficiently with these 16x8x4 ECT-32 kraft corrugated boxes. Ideal for apparel, books, artwork, and picture frames, these cardboard shipping cartons ship flat to maximize warehouse storage and reduce freight spend. Sold in bundles of 25.
Boxes - Corrugated

16x8x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1684

16 x 8 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$28.06 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes in 15x9x8" dimensions–the proven industry standard for mid-sized shipments. Ships flat to maximize warehouse storage and reduce inbound freight costs. 25-box bundle delivers immediate inventory without volume commitment.
Boxes - Corrugated

15x9x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1598

15 x 9 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$30.18 / BUNDLE
IN STOCK ECT-32 single wall white corrugated boxes in 14" x 10" x 10" dimensions–the industry standard for warehouse shipping and storage. This 25-pack bundle delivers the same reliable stacking strength as kraft cartons with a crisp white finish that makes printed labels and shipping instructions pop. Maximize freight efficiency while maintaining shipment appearance with professional-grade corrugated construction.
Boxes - Corrugated

14x10x10 ECT-32 White Corrugated Shipping Boxes Single Wall 25-Pack

PN: 141010W

14 x 10 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$45.54 / BUNDLE
IN STOCK Reduce carton SKUs and shipping costs with these pre-scored 14x10x10 multi-depth corrugated boxes. ECT-32 kraft construction folds to multiple heights–no carton sizer required. Bundle of 25 boxes optimizes warehouse space and parcel service pricing.
Boxes - Corrugated

14x10x10 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 25-Pack

PN: MD141010

14 x 10 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$39.27 / BUNDLE
IN STOCK Dependable 14x10x10 corrugated boxes in ECT-32 kraft construction deliver standard strength performance for mid-weight shipments. This 25-pack bundle provides cost-effective packaging for warehouse operations, fulfillment centers, and e-commerce distribution. Fully recyclable cardboard shipping cartons built to stack efficiently.
Boxes - Corrugated

14x10x10 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 141010

14 x 10 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$30.51 / BUNDLE
IN STOCK 14x10x7 Kraft Corrugated Shipping Boxes, 1,000 Pack Pallet, 32 ECT
Boxes - Corrugated

14x10x7 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 14107

14 x 10 x 7 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$28.16 / BUNDLE

Product Help Request

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Buying path

Buy Boxes & Mailers by the specs that change the order

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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 ->