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 Heavy-duty ECT-32-B white corrugated mailers in 12x9x4 dimensions deliver crush-resistant protection with zero assembly time. One-piece fold-and-tuck design requires no tape, glue, or staples–saving your team labor costs while cutting postage expenses. Sold as a bundle of 50 per case.
Boxes - Mailers

12x9x4 ECT-32-B White Corrugated Mailers 50/Bundle

PN: MLR1294

12 x 9 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$130.64 / BUNDLE
IN STOCK Ship lightweight items efficiently with these ECT-32-B white corrugated mailers (12" x 9" x 3"). One-piece fold-and-tuck design eliminates tape, glue, and staples while delivering crush-resistant double-wall protection on front and sides. Bulk 50-pack reduces per-unit costs and freight spend.
Boxes - Mailers

12x9x3 ECT-32 White One-Piece Corrugated Mailers 50-Pack

PN: MLR1293

12 x 9 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$122.29 / BUNDLE
IN STOCK ECT-32-B white corrugated mailers engineered for small item shipping with double-wall crush resistance. One-piece fold-and-tuck design eliminates tape, glue, and staples–assembly takes seconds. 50-pack bundle maximizes cost savings per unit.
Boxes - Mailers

12x9x2 ECT-32 White Corrugated Mailers 50/Bundle

PN: MLR1292

12 x 9 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$113.93 / BUNDLE
IN STOCK One-piece, one-fold design with double-wall crush resistance on front and sides–no tape, glue, or staples required. ECT-32-B corrugated construction rated for repeated stacking and handling. Bundle of 50 white mailers sized 12" x 6" x 6" for small-to-medium parcels.
Boxes - Mailers

12x6x6 ECT-32 White Corrugated Mailers 50-Pack

PN: M1266

12 x 6 x 6 in ECT-32-B Corrugated 50 PER BUNDLE
$84.31 / BUNDLE
IN STOCK ECT-32-B white corrugated mailers deliver crush-resistant protection with zero assembly required–fold and ship in seconds. Engineered for small parcel logistics, these 12x6x4 one-piece mailers reduce material waste and freight costs while securing fragile items with double-wall front and side protection. Sold as a 50-bundle for volume efficiency.
Boxes - Mailers

12x6x4 ECT-32 White Corrugated Mailers 50-Pack

PN: M1264

12 x 6 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$58.11 / BUNDLE
IN STOCK ECT-32-B white corrugated mailers in 12x6x3" dimensions ship lightweight items with double-wall crush resistance. One-piece fold-and-tuck design requires no tape, glue, or staples–reducing assembly labor and fulfillment time. Sold as a 50-pack bundle.
Boxes - Mailers

12x6x3 ECT-32 White Corrugated Mailers 50-Pack

PN: M1263

12 x 6 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$75.20 / BUNDLE
IN STOCK Ship small, lightweight items with confidence using these ECT-32-B white corrugated mailers. Pre-scored fold-and-tuck design delivers double-wall protection on front and sides without tape, glue, or staples. Bundle of 50 units ready to stock your fulfillment operation.
Boxes - Mailers

12x6x2 ECT-32 White Corrugated Mailers 50-Pack

PN: M1262

12 x 6 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$72.92 / BUNDLE
IN STOCK Professional-grade 12x5x5 white corrugated mailers built from ECT-32-B material for maximum crush resistance and freight efficiency. One-piece fold-and-tuck design eliminates tape, glue, and staples–ready to pack in seconds. Bundle of 50 mailers reduces per-unit cost and keeps your fulfillment operation lean.
Boxes - Mailers

12x5x5 ECT-32 White Corrugated Mailers 50-Pack

PN: M1255

12 x 5 x 5 in ECT-32-B Corrugated 50 PER BUNDLE
$80.51 / BUNDLE
IN STOCK Ship small items with confidence using these ECT-32-B white corrugated mailers. One-piece fold-and-tuck design assembles in seconds with double-wall crush resistance on front and sides–no tape, glue, or staples required. Bundle of 50 mailers per case.
Boxes - Mailers

12x5x4 ECT-32 White Corrugated Mailers 50-Pack

PN: M1254

12 x 5 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$74.44 / BUNDLE
IN STOCK Save 15-20% on shipping costs with lightweight ECT-32-B white corrugated mailers that require zero assembly. These crush-resistant 12x4x4 one-piece mailers fold in seconds and provide double-wall protection on front and sides–perfect for small parcels, samples, and lightweight fragile items.
Boxes - Mailers

12x4x4 ECT-32 White Corrugated Mailers 50-Pack

PN: M1244

12 x 4 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$45.71 / BUNDLE
IN STOCK Professional-grade 12x4x3 white corrugated mailers engineered with ECT-32-B material for superior crush resistance and stacking performance. One-piece fold-and-tuck design eliminates tape, glue, and labor–ready to ship in seconds. Sold as 50-count bundles for maximum volume savings.
Boxes - Mailers

12x4x3 ECT-32 White Corrugated Mailers 50-Pack

PN: M1243

12 x 4 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$61.52 / BUNDLE
IN STOCK Ship lightweight items with confidence using these ECT-32-B white corrugated mailers in 12x3.5x3 dimensions. One-piece fold-and-tuck construction eliminates assembly time while crush-resistant double walls protect fragile contents. Bundle of 50 delivers maximum freight efficiency and volume savings for warehouse operations.
Boxes - Mailers

12x3.5x3 ECT-32 White Corrugated Mailers 50-Pack

PN: MLR7

12 x 3.5 x 3 in ECT-32-B Corrugated 50 PER BUNDLE
$36.02 / BUNDLE
IN STOCK Engineered ECT-32-B white corrugated mailers with crush-resistant double-wall protection. These 12x2x2 one-piece fold-and-tuck mailers require no tape, glue, or staples–reducing prep time and material costs. Bundle of 50 ships ready to maximize your fulfillment efficiency.
Boxes - Mailers

12x2x2 ECT-32 White Corrugated Mailers 50-Pack

PN: M1222

12 x 2 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$34.94 / BUNDLE
IN STOCK Crush-resistant one-piece white corrugated mailers built from ECT-32-B material for maximum durability without added weight. Ships in bundles of 50 with zero assembly required–fold, tuck, and seal in seconds. Perfect for lightweight fragile items, electronics, and small package shipments.
Boxes - Mailers

11.5x3.5x3.5 ECT-32 White Corrugated Mailers 50/Bundle

PN: MLRB

11 1/2 x 3.5 x 3 1/2 in ECT-32-B Corrugated 50 PER BUNDLE
$35.70 / BUNDLE
IN STOCK Save on postage and labor with these ECT-32-B white corrugated mailers in 11x8x4" dimensions. One-piece fold-and-tuck design requires zero tape, glue, or staples–assembly takes seconds. Double-wall crush-resistant construction protects fragile items while keeping freight costs down. Sold 50 per bundle.
Boxes - Mailers

11x8x4 ECT-32-B White Corrugated Mailers 50/Bundle

PN: MLR1184

11 x 8 x 4 in ECT-32-B Corrugated 50 PER BUNDLE
$97.98 / BUNDLE
IN STOCK Engineered ECT-32-B white corrugated mailers designed for warehouse and fulfillment operations shipping small, lightweight items. One-piece fold-and-tuck construction requires no tape, glue, or staples–double walls crush resistant and ready to use in seconds. Bundle of 50 mailers optimizes freight efficiency and reduces per-unit packaging costs.
Boxes - Mailers

11x8x2 ECT-32 White Corrugated Mailers 50-Pack

PN: M1182R

11 x 8 x 2 in ECT-32-B Corrugated 50 PER BUNDLE
$94.19 / 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 ->