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 orange "Packing List Enclosed" envelopes sized 4.5" x 5.5" with pre-printed messaging for fast document identification at the receiving dock. Made from 2 mil polyethylene with hot melt adhesive backing that sticks reliably to corrugated boxes and paper. Case of 1,000 envelopes–the efficient choice for high-volume shipping operations.
Packing List Envelopes

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

PN: PL12

4 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$29.12 / CASE
IN STOCK Full-face yellow packing list envelopes with pre-printed script messaging and hot melt adhesive backing for secure document protection during shipping. 4.5" x 6" size, heavy 2 mil poly construction. Sold by the case of 1,000 units.
Packing List Envelopes

4.5x6 2 Mil Yellow Self-Adhesive Packing List Envelopes 1000/Case

PN: PL441

4 1/2 x 6 in 2 Mil Poly 1000 PER CASE
$35.58 / CASE
IN STOCK Protect critical shipping documents with these pre-printed 4.5x6" orange packing list enclosed envelopes. Made from durable 2 mil poly with hot melt adhesive backing for reliable adhesion to corrugated and paper surfaces. Full-face script printing ensures documents stay secure and visible throughout the fulfillment process–sold by the case of 1,000.
Packing List Envelopes

4.5x6 Orange Packing List Enclosed Envelopes 1000/Case

PN: PL1

4 1/2 x 6 in 2 Mil Poly 1000 PER CASE
$46.05 / CASE
IN STOCK 10x12" Red Packing List Envelopes - 2 Mil Poly, Case of 500
Packing List Envelopes

10x12 2 Mil Red Self-Adhesive Packing List Envelopes 500/Case

PN: PL430

10 x 12 in 2 Mil Poly 500 PER CASE
$133.95 / CASE
IN STOCK 10x12" Orange Packing List Enclosed Envelopes - 2 Mil Poly, 500/Case
Packing List Envelopes

10x12 2 Mil Orange Self-Adhesive Packing List Envelopes 500/Case

PN: PL429

10 x 12 in 2 Mil Poly 500 PER CASE
$133.95 / CASE
IN STOCK 10x12" Yellow Packing List Enclosed Envelopes - 2 Mil Poly, Case of 500
Packing List Envelopes

10x12 2 Mil Yellow Self-Adhesive Packing List Envelopes 500/Case

PN: PL433

10 x 12 in 2 Mil Poly 500 PER CASE
$99.00 / CASE
IN STOCK Pre-printed green packing list envelopes (7" x 5.5") deliver reliable document protection with strong hot melt adhesive backing. Heavy 2 mil poly construction and full-face "Packing List Enclosed" messaging ensure professional shipments. Order by the case–1,000 envelopes per box.
Packing List Envelopes

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

PN: PL459

7 x 5.5 in 2 Mil Poly 1000 PER CASE
$48.07 / CASE
IN STOCK Pre-printed "Packing List Enclosed" envelopes safeguard shipping documents with full-face visibility and secure adhesion. Heavy-duty 2 mil poly construction with hot melt backing ensures reliable document protection during transit. Blue color provides professional branding for every shipment.
Packing List Envelopes

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

PN: PL407

7 x 5.5 in 2 Mil Poly 1000 PER CASE
$55.55 / CASE
IN STOCK Pre-printed "Packing List Enclosed" envelopes in bright red 2 mil poly protect critical shipping documents with reliable hot melt adhesion. Designed for fulfillment teams managing high-volume orders, these 7" x 5.5" full-face envelopes ensure compliance and professional presentation. Case of 1000 envelopes ready to ship.
Packing List Envelopes

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

PN: PL406

7 x 5.5 in 2 Mil Poly 1000 PER CASE
$55.55 / CASE
IN STOCK Pre-printed "Packing List Enclosed" envelopes designed for shipping managers who need fast, reliable document protection. 7" x 5.5" yellow poly construction with industrial-strength hot melt adhesive ensures secure attachment to corrugated boxes and paper surfaces. 1,000 envelopes per case.
Packing List Envelopes

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

PN: PL456

7 x 5.5 in 2 Mil Poly 1000 PER CASE
$48.07 / CASE
IN STOCK Professional-grade orange packing list enclosed envelopes designed for shipping managers who need reliable document protection. Pre-printed full-face messaging on heavy 2 mil poly with hot melt adhesive backing ensures secure attachment to corrugated boxes and paper shipments. Ships 1000 envelopes per case.
Packing List Envelopes

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

PN: PL22

7 x 5.5 in 2 Mil Poly 1000 PER CASE
$55.55 / CASE
IN STOCK Pre-printed red "Packing List Enclosed" envelopes protect shipping documents with strong hot melt adhesive backing. Heavy 2 mil poly construction measures 5.5" x 10" and ships as a case of 1,000 envelopes. Full-face design ensures visibility and compliance for every shipment.
Packing List Envelopes

5.5x10 2 Mil Red Packing List Enclosed Envelopes 1000/Case PL427

PN: PL427

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. Heavy-duty 2 mil poly construction with hot melt adhesive backing ensures secure attachment to corrugated cartons during transit. Full case of 1,000 envelopes ready to streamline your fulfillment operation.
Packing List Envelopes

5.5x10 2 Mil Orange Packing List Enclosed Envelopes 1000/Case

PN: PL426

5 1/2 x 10 in 2 Mil Poly 1000 PER CASE
$81.63 / CASE
IN STOCK Pre-printed yellow packing list enclosed envelopes designed for fulfillment managers who need reliable document protection during shipping. Features durable 2 mil poly construction with hot melt adhesive backing for secure attachment to corrugated and paper surfaces. Full-face design with bold "Packing List Enclosed" messaging–1,000 envelopes per case.
Packing List Envelopes

5.5x10 2 Mil Yellow Packing List Enclosed Envelopes 1000/Case

PN: PL425

5 1/2 x 10 in 2 Mil Poly 1000 PER CASE
$81.63 / CASE
IN STOCK Protect shipping documents with professional pre-printed packing list envelopes. Heavy 2 mil poly construction with bold red/white stripes and hot melt adhesive backing ensures reliable document protection and easy identification during fulfillment. Case of 1000 envelopes sized 4.5" x 6".
Packing List Envelopes

4.5x6 2 Mil Red Packing List Enclosed Envelopes 1000/Case PL451

PN: PL451

4 1/2 x 6 in 2 Mil Poly 1000 PER CASE
$35.58 / CASE
IN STOCK Heavy-duty 2 mil poly packing list envelopes keep your shipping documents protected and organized in transit. Pre-printed 'Packing List Enclosed' messaging eliminates manual labeling and speeds fulfillment. Red color provides high visibility for fast identification–1,000 envelopes per case.
Packing List Envelopes

4.5x6 2 Mil Red Packing List Enclosed Envelopes 1000/Case PL444

PN: PL444

4 1/2 x 6 in 2 Mil Poly 1000 PER CASE
$35.58 / 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 ->