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 Full-face red packing list envelopes with bold pre-printed messaging and heavy 2 mil poly construction. Hot melt adhesive backing bonds instantly to paper and corrugated boxes. Case of 1000 envelopes sized 4.5" x 6" for efficient fulfillment operations.
Packing List Envelopes

4.5x6 2 Mil Red Packing List Enclosed Envelopes 1000/Case PL413

PN: PL413

4 1/2 x 6 in 2 Mil Poly 1000 PER CASE
$40.04 / CASE
IN STOCK Pre-printed green packing list envelopes designed to protect and organize shipping documents. 4.5" x 5.5" full-face design on durable 2 mil poly with hot melt adhesive for reliable adhesion to corrugated and paper surfaces. Sold by the case of 1,000.
Packing List Envelopes

4.5x5.5 2 Mil Green Self-Adhesive Packing List Envelopes 1000/Case

PN: PL404

4 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$33.55 / CASE
IN STOCK Protect your shipping documents with full-face blue packing list envelopes designed for fulfillment managers. Pre-printed "Packing List Enclosed" message on durable 2 mil poly with hot melt adhesive for reliable adhesion to corrugated boxes and paper. Ships as case of 1,000 units.
Packing List Envelopes

4.5x5.5 2 Mil Blue Self-Adhesive Packing List Envelopes 1000/Case

PN: PL403

4 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$33.55 / CASE
IN STOCK Pre-printed "Packing List Enclosed" envelopes designed for shipping managers who need fast, reliable document protection. 4.5" x 5.5" red poly envelopes with hot melt adhesive backing–1,000 per case. Strong adhesion to corrugated boxes and paper.
Packing List Envelopes

4.5x5.5 2 Mil Red Self-Adhesive Packing List Envelopes 1000/Case

PN: PL402

4 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$33.55 / CASE
IN STOCK Pre-printed yellow packing list enclosed envelopes protect critical shipping documents with full-face visibility and reliable hot melt adhesive. Heavy 2 mil poly construction withstands corrugated and paper surfaces. Order a case of 1,000 envelopes designed for high-volume fulfillment operations.
Packing List Envelopes

4.5x5.5 2 Mil Yellow Self-Adhesive Packing List Envelopes 1000/Case

PN: PL452

4 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$34.50 / CASE
IN STOCK Full-face orange packing list enclosed envelopes protect critical shipping documents during transit. Pre-printed with "Packing List Enclosed" messaging on durable 2 mil poly material with hot melt adhesive backing for secure attachment to corrugated boxes and paper shipments. Case of 1,000 envelopes, 4.5" x 5.5" dimensions.
Packing List Envelopes

4.5x5.5 2 Mil Orange Self-Adhesive Packing List Envelopes 1000/Case

PN: PL10

4 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$32.29 / CASE
IN STOCK Protect your shipping documents with pre-printed invoice enclosed envelopes designed for packing list clarity and compliance. These adhesive-backed, 2 mil poly envelopes measure 7.5" x 5.5" and come in a case of 1,000, reducing material costs while keeping invoices secure and visible during transit.
Packing List Envelopes

7.5x5.5 2 Mil Yellow Invoice Enclosed Packing List Envelopes

PN: PL528

7 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$71.14 / CASE
IN STOCK Professional 7" x 5.5" orange poly envelopes with pre-printed "Invoice Enclosed" messaging. Made from durable 2 mil polyethylene with adhesive backing for secure document protection during shipping. Order by the case–1,000 envelopes per case for maximum cost efficiency.
Packing List Envelopes

7x5.5 Orange Invoice Enclosed Packing List Envelopes 1000/Case

PN: PL415

7 x 5.5 in 2 Mil Poly 1000 PER CASE
$78.01 / CASE
IN STOCK Protect your invoices and packing lists during transit with these pre-printed orange shipping envelopes. 7" x 5.5" adhesive-backed design holds documents securely. 2 mil poly construction ensures durability. Case of 1000 units maximizes cost efficiency for high-volume shippers.
Packing List Envelopes

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

PN: PL23

7 x 5.5 in 2 Mil Poly 1000 PER CASE
$50.86 / CASE
IN STOCK Pre-printed 7x5" clear invoice enclosed envelopes protect critical shipping documents with adhesive-backing for reliable closure. Made from durable 2 mil poly and sold by the case of 1,000 units. Meets shipping compliance requirements and reduces document loss during transit.
Packing List Envelopes

7x5 2 Mil Clear Invoice Enclosed Packing List Envelopes 1000/Case

PN: PL481

7 x 5 in 2 Mil Poly 1000 PER CASE
$66.60 / CASE
IN STOCK Pre-printed orange "Invoice Enclosed" envelopes keep packing lists and invoices visible and protected during shipment. Made from durable 2 mil polyethylene with adhesive backing for secure attachment. Case of 1,000 units optimizes your packaging costs while maintaining shipping compliance.
Packing List Envelopes

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

PN: PL27

5 1/2 x 10 in 2 Mil Poly 1000 PER CASE
$75.32 / CASE
IN STOCK Pre-printed "Invoice Enclosed" red poly envelopes protect your shipping documents and ensure packing list compliance. 4.5" x 6" adhesive-backed design in durable 2 mil material. Case of 1000 units keeps your packaging costs low and your workflow efficient.
Packing List Envelopes

4.5x6 2 Mil Red Invoice Enclosed Packing List Envelopes 1000/Case PL420

PN: PL420

4 1/2 x 6 in 2 Mil Poly 1000 PER CASE
$43.47 / CASE
IN STOCK Red 4.5x6 invoice enclosed envelopes keep shipping documents protected and organized in transit. Pre-printed design with adhesive backing for fast, secure application on packages. Sold as a case of 1,000 durable 2 mil poly envelopes.
Packing List Envelopes

4.5x6 2 Mil Red Invoice Enclosed Packing List Envelopes 1000/Case PL463

PN: PL463

4 1/2 x 6 in 2 Mil Poly 1000 PER CASE
$50.00 / CASE
IN STOCK Pre-printed "Invoice Enclosed" envelopes designed for industrial shipping and packing list protection. 4.5" x 6" adhesive-backed poly envelopes in bright orange for maximum visibility. Each case contains 1,000 durable 2 mil poly envelopes–cost-effective document protection for high-volume shippers.
Packing List Envelopes

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

PN: PL3

4 1/2 x 6 in 2 Mil Poly 1000 PER CASE
$51.74 / CASE
IN STOCK Protect shipping documents and invoices with these pre-printed orange packing list envelopes. 4.5" x 5.5" adhesive-backed design in durable 2 mil poly. Sold by the case (1000 units) for maximum cost efficiency and compliance with USPS/UPS shipping requirements.
Packing List Envelopes

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

PN: PL17

4 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$48.85 / CASE
IN STOCK Pre-printed "Invoice Enclosed" orange poly envelopes designed to protect packing lists and invoices during shipping. Adhesive-backed 2 mil poly construction ensures durability and professional presentation. Sold by the case (1000 units) for maximum cost efficiency.
Packing List Envelopes

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

PN: PL13

4 1/2 x 5.5 in 2 Mil Poly 1000 PER CASE
$32.29 / 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 ->