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 15x12x14 Kraft Corrugated Shipping Boxes, 375 Pack Pallet, 32 ECT
Boxes - Corrugated

15x12x14 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 151214

15 x 12 x 14 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$78.91 / BUNDLE
IN STOCK Eliminate carton size proliferation with these pre-scored 15x12x12 kraft corrugated boxes that fold to 3 different heights–no sizer required. One SKU replaces multiple box styles, cutting inventory costs and parcel shipping fees. ECT-32 single wall construction delivers reliable protection at maximum freight efficiency.
Boxes - Corrugated

15x12x12 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 25-Pack

PN: MD151212

15 x 12 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$46.74 / BUNDLE
IN STOCK Heavy-duty 15x12x12 corrugated shipping boxes made from ECT-32 kraft material deliver reliable stacking strength and protection for mid-weight industrial shipments. Each 25-pack bundle maximizes freight efficiency and reduces per-unit packaging costs. Recyclable kraft construction ensures sustainability without compromising durability.
Boxes - Corrugated

15x12x12 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 151212

15 x 12 x 12 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$45.62 / BUNDLE
IN STOCK Heavy-duty ECT-44 kraft corrugated shipping boxes deliver 40% greater strength than standard containers, maximizing stacking performance and freight efficiency. 15" x 12" x 10" dimensions suit mid-sized fulfillment operations. Sold flat in bundles of 25 for volume savings and warehouse space optimization.
Boxes - Corrugated

15x12x10 ECT-44 Kraft Heavy-Duty Corrugated Shipping Boxes 25-Pack

PN: HD151210

15 x 12 x 10 in ECT-44 Single Wall Corrugated 25 PER BUNDLE
$88.99 / BUNDLE
IN STOCK Professional-grade 15x12x10 white corrugated boxes (ECT-32 single-wall) in bundles of 25 for efficient file storage and product shipping. High-contrast white surface makes labels and shipping marks instantly visible. Ready to seal and ship with superior stacking performance.
Boxes - Corrugated

15x12x10 ECT-32 White Corrugated Shipping Boxes 25-Pack

PN: 151210W

15 x 12 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$49.94 / BUNDLE
IN STOCK Industrial-grade 15x12x10" corrugated boxes built from ECT-32 kraft material for reliable file storage and shipping. Each bundle includes 25 boxes with easy-fold flaps–perfect for legal and letter-sized documents. Standard strength design maximizes warehouse efficiency at economical bulk pricing.
Boxes - Corrugated

15x12x10 ECT-32 Kraft Corrugated Boxes

PN: 151210

15 x 12 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$40.22 / BUNDLE
IN STOCK ECT-32 single-wall kraft corrugated boxes in 15" × 12" × 8" dimensions deliver proven standard strength for mid-weight shipping and storage applications. This 25-box bundle offers consistent stacking performance and cost-efficient freight density for high-volume fulfillment operations. Fully recyclable kraft material reduces environmental impact while maintaining structural integrity.
Boxes - Corrugated

15x12x8 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 15128

15 x 12 x 8 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$38.21 / BUNDLE
IN STOCK ECT-32 single wall kraft corrugated boxes in 15x12x5" dimensions–engineered for shallow-depth products like apparel, books, and artwork. Ships flat to maximize storage efficiency and reduce freight spend. Sold in bundles of 25.
Boxes - Corrugated

15x12x5 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 15125

15 x 12 x 5 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$52.81 / BUNDLE
IN STOCK ECT-32 kraft corrugated cartons sized 15" × 12" × 3" for shipping lightweight to mid-weight products like apparel, books, and artwork. Ships flat in bundles of 25 to maximize warehouse efficiency and reduce freight costs. Single-wall construction delivers reliable protection at competitive volume pricing.
Boxes - Corrugated

15x12x3 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 15123

15 x 12 x 3 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$41.54 / BUNDLE
IN STOCK Industrial-grade ECT-32 kraft corrugated shipping boxes in 13½" x 13½" x 7½" dimensions, sold as a bundle of 25 cartons. Proven single-wall construction delivers reliable protection and cost-effective freight performance for mid-size order fulfillment. Fully recyclable cardboard construction supports your sustainability goals.
Boxes - Corrugated

13.5x13.5x7.5 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 13137

13 1/2 x 13 1/2 x 7 1/2 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$39.85 / BUNDLE
IN STOCK 13x13x13 Heavy Duty Double Wall Corrugated Shipping Boxes, 360 Pack Pallet, 48 ECT
Boxes - Corrugated

13x13x13 ECT-48 Heavy Duty Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD1313DW

13 x 13 x 13 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$47.07 / BUNDLE
IN STOCK 18x9x9 Kraft Corrugated Shipping Boxes, 825 Pack Pallet, 32 ECT
Boxes - Corrugated

18x9x9 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 1899

18 x 9 x 9 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$34.50 / BUNDLE
IN STOCK Industrial-grade ECT-48 double wall corrugated boxes engineered for maximum stacking performance and freight efficiency. 15x12x12" kraft cartons ship flat to reduce storage footprint. Bundle of 15 boxes–the heavy duty standard for warehouse operations.
Boxes - Corrugated

15x12x12 ECT-48 Kraft Double Wall Corrugated Boxes 15-Pack

PN: HD151212DW

15 x 12 x 12 in ECT-48 Double Wall Corrugated 15 PER BUNDLE
$67.58 / BUNDLE
IN STOCK Heavy-duty ECT-48 kraft double wall corrugated boxes engineered for maximum protection and stacking performance. 15x12x10 dimensions ideal for mid-weight industrial shipments. Sold as a bundle of 15 cartons that ship flat to reduce warehouse footprint and freight costs.
Boxes - Corrugated

15x12x10 ECT-48 Kraft Double Wall Corrugated Shipping Boxes 15-Pack

PN: HD151210DW

15 x 12 x 10 in D.W./ECT-48 Corrugated 15 PER BUNDLE
$70.25 / BUNDLE
IN STOCK Adjust box height on-the-fly with scored multi-depth sides–no carton sizer needed. These 15x12x10 ECT-32 kraft corrugated boxes fold to multiple depths, letting you eliminate SKUs and shrink parcel service fees. Bundle of 25 boxes.
Boxes - Corrugated

15x12x10 ECT-32 Kraft Multi-Depth Corrugated Shipping Boxes 25-Pack

PN: MD151210

15 x 12 x 10 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$83.63 / BUNDLE
IN STOCK Ship smarter with 15x12x4 ECT-32 kraft corrugated boxes designed for shallow products and lightweight shipments. This bundle of 25 flat boxes reduces your storage footprint while maintaining reliable stacking performance. Perfect for apparel, books, frames, and artwork–engineered to protect and economize.
Boxes - Corrugated

15x12x4 ECT-32 Kraft Corrugated Shipping Boxes 25-Pack

PN: 15124

15 x 12 x 4 in ECT-32 Single Wall Corrugated 25 PER BUNDLE
$30.87 / 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 ->