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 Pre-printed "Packing List Enclosed" envelopes in durable 2 mil poly with hot melt adhesive backing for reliable document protection during shipping. Red 7" x 5 1/2" panel face envelopes provide secure adhesion to corrugated and paper surfaces. Ships as case of 1000.
Packing List Envelopes

7x5.5 2 Mil Red Packing List Enclosed Envelopes 1000/Case

PN: PL457

7 x 5.5 in 2 Mil Poly 1000 PER CASE
$48.07 / CASE
IN STOCK Streamline your fulfillment process with pre-printed orange packing list envelopes designed to protect documents and accelerate shipping. These 7" x 5 1/2" envelopes feature heavy 2 mil poly construction with hot melt adhesive backing that bonds securely to paper and corrugated surfaces. Case of 1,000 envelopes ready to ship.
Packing List Envelopes

7x5.5 2 Mil Orange Self-Adhesive Packing List Envelopes 1000/Case

PN: PL19

7 x 5.5 in 2 Mil Poly 1000 PER CASE
$48.07 / CASE
IN STOCK Heavy-duty 2 mil poly packing list enclosed envelopes protect critical shipping documents from moisture and damage during transit. Pre-printed yellow design, 6 3/4" x 5" top-loading format, 1000 per case. Essential for fulfillment operations requiring document security and quick identification.
Packing List Envelopes

6 3/4 x 5 in 2 Mil Yellow Poly Packing List Enclosed Envelopes 1000/Case

PN: PL460

6 3/4 x 5 in 2 Mil Poly 1000 PER CASE
$80.59 / CASE
IN STOCK Orange packing list envelopes keep shipping documents protected and organized. Pre-printed "Packing List Enclosed" messaging on durable 2 mil poly with hot melt adhesive backing for secure adhesion to corrugated boxes and paper products. Order by the case of 1000.
Packing List Envelopes

6.5x5 2 Mil Orange Packing List Enclosed Envelopes 1000/Case

PN: PL25

6 1/2 x 5 in 2 Mil Poly 1000 PER CASE
$69.54 / CASE
IN STOCK Protect critical shipping documents with these pre-printed green packing list enclosed envelopes. Made from durable 2 mil poly with hot melt adhesive backing for reliable adhesion to corrugated and paper surfaces. Each case contains 1,000 envelopes sized 5.5" x 10" for standard document protection during fulfillment and transit.
Packing List Envelopes

5.5x10 2 Mil Green Self-Adhesive Packing List Envelopes 1000/Case

PN: PL432

5 1/2 x 10 in 2 Mil Poly 1000 PER CASE
$81.63 / CASE
IN STOCK Pre-printed blue packing list enclosed envelopes designed for shipping managers who need document protection during fulfillment. 5.5" x 10" poly construction with hot melt adhesive backing ensures secure adhesion to corrugated boxes and paper. Case of 1,000 envelopes ready to streamline your packing process.
Packing List Envelopes

5.5x10 2 Mil Blue Self-Adhesive Packing List Envelopes 1000/Case

PN: PL431

5 1/2 x 10 in 2 Mil Poly 1000 PER CASE
$81.63 / CASE
IN STOCK Pre-printed red "Packing List Enclosed" envelopes designed for shipping managers who need reliable document protection and fast fulfillment processing. Heavy 2 Mil poly construction with hot melt adhesive backing adheres securely to corrugated boxes and paper. 5.5x10" panel face envelopes sold in cases of 1000 for high-volume operations.
Packing List Envelopes

5.5x10 2 Mil Red Packing List Enclosed Envelopes 1000/Case PL446

PN: PL446

5 1/2 x 10 in 2 Mil Poly 1000 PER CASE
$81.63 / CASE
IN STOCK Protect your shipping documents with these pre-printed 5.5x10" yellow packing list envelopes. Heavy 2 mil poly construction with hot melt adhesive backing bonds securely to corrugated boxes and paper. Case of 1000 envelopes ready to streamline your fulfillment operation.
Packing List Envelopes

5.5x10 2 Mil Yellow Self-Adhesive Packing List Envelopes 1000/Case

PN: PL445

5 1/2 x 10 in 2 Mil Poly 1000 PER CASE
$81.63 / CASE
IN STOCK Protect critical shipping documents with pre-printed orange packing list envelopes designed for fast, reliable identification. Heavy 2 mil poly construction with hot melt adhesive backing ensures strong adhesion to corrugated boxes and paper surfaces. Case of 1,000 envelopes ready to streamline your fulfillment operations.
Packing List Envelopes

5.5x10 2 Mil Orange Self-Adhesive Packing List Envelopes 1000/Case

PN: PL24

5 1/2 x 10 in 2 Mil Poly 1000 PER CASE
$70.17 / CASE
IN STOCK Pre-printed "Packing List Enclosed" envelopes in bright red 2 mil poly protect critical shipping documents with reliable hot melt adhesive. Sized 4.5" × 7.5" and sold by the case of 1,000 for high-volume fulfillment operations. Panel-face design ensures clear visibility on corrugated boxes and paper-based shipments.
Packing List Envelopes

4.5x7.5 2 Mil Red Self-Adhesive Packing List Envelopes 1000/Case

PN: PL461

4 1/2 x 7.5 in 2 Mil Poly 1000 PER CASE
$69.07 / CASE
IN STOCK Pre-printed green "Packing List Enclosed" envelopes designed for shipping managers who need reliable document protection. 4.5" x 6" heavy-duty 2 mil poly with hot melt adhesive backing for superior adhesion to corrugated and paper surfaces. Order by the case of 1,000 and streamline your fulfillment process.
Packing List Envelopes

4.5x6 2 Mil Green Packing List Enclosed Envelopes 1000/Case

PN: PL489

4 1/2 x 6 in 2 Mil Poly 1000 PER CASE
$46.05 / CASE
IN STOCK Pre-printed blue packing list envelopes (4.5" x 6") engineered for shipping managers who need reliable document protection. Heavy 2 mil poly construction with hot melt adhesive backing ensures documents stay secure to corrugated boxes and paper products. Case of 1000 envelopes.
Packing List Envelopes

4.5x6 2 Mil Blue Packing List Enclosed Envelopes 1000/Case

PN: PL488

4 1/2 x 6 in 2 Mil Poly 1000 PER CASE
$46.05 / CASE
IN STOCK Orange "Packing List Enclosed" envelopes designed for shipping managers who need reliable document protection. Heavy 2 mil poly construction with hot melt adhesive backing ensures secure attachment to packages and corrugated boxes. Pre-printed messaging eliminates manual labeling–1,000 envelopes per case.
Packing List Envelopes

4.5x6 2 Mil Orange Packing List Enclosed Envelopes 1000/Case PL442

PN: PL442

4 1/2 x 6 in 2 Mil Poly 1000 PER CASE
$35.58 / CASE
IN STOCK Pre-printed "Packing List Enclosed" envelopes designed for shipping managers who need document protection and fast fulfillment processing. Made from durable 2 mil polyethylene with hot melt adhesive backing that bonds securely to paper and corrugated surfaces. Case of 1,000 envelopes (4.5" x 5.5") in professional green with panel face design.
Packing List Envelopes

4.5x5.5 2 Mil Green Packing List Enclosed Envelopes 1000/Case

PN: PL455

4 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$34.50 / CASE
IN STOCK Secure and label shipping documents instantly with these pre-printed 4.5x5.5" blue packing list enclosed envelopes. Heavy 2 mil poly construction with hot melt adhesive backing adheres reliably to paper and corrugated boxes. Case of 1,000 envelopes ready to ship.
Packing List Envelopes

4.5x5.5 Blue Packing List Enclosed Envelopes 1000/Case

PN: PL454

4 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$34.50 / CASE
IN STOCK Professional red "Packing List Enclosed" envelopes protect shipping documents with strong hot melt adhesive backing. Heavy 2 mil poly construction ensures durability through the supply chain. Panel face design and pre-printed messaging eliminate manual labeling–ship smarter with 1,000 envelopes per case.
Packing List Envelopes

4.5x5.5 2 Mil Red Packing List Envelopes 1000/Case PL493

PN: PL493

4 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$44.67 / CASE

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 ->