Boxes & Mailers

SELECTION EXPERT ADVICE

Wall Strength & Load Capacity
MORE INFO
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
MORE INFO
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
MORE INFO
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

Boxes Mailers — compare in-stock Packrift options by exact spec, with public pricing and no account required. Ships from 5 US warehouses (Central IL, NE PA, South TX, SE GA, West CA), routed to the location nearest you. Below are verified catalog SKUs, collection paths, and a bulk-quote route.

What To Buy Here

  • You need a Packrift buying path for Boxes Mailers.
  • You want verified SKU links, current catalog specs, and a quote route instead of thin search copy.
  • You are comparing product fit before reordering or requesting a bulk quote.

Catalog Matches

SKU Product Dimensions Material Color Pack
1066 10x6x6 ECT-32 Kraft Long Corrugated Boxes - 25 Bundle 10 x 6 x 6 kraft corrugated kraft 25
1054 10x5x4 ECT-32 Kraft Corrugated Boxes - Long Side Opening, 25 Bundle 10 x 5 x 4 kraft corrugated kraft 25
1265 12x6x5" ECT-32 Kraft Corrugated Long Boxes - 25 Bundle 12 x 6 x 5 kraft corrugated kraft 25
1333 13x3x3 ECT-32 Kraft Corrugated Long Boxes - Easy Pack, 25 Bundle 13 x 3 x 3 kraft corrugated kraft 25
1388 13x8x8 ECT-32 Kraft Corrugated Boxes - Long Item Shipping, 25 Bundle 13 x 8 x 8 kraft corrugated kraft 25
1466 14x6x6" ECT-32 Kraft Corrugated Boxes - Long Item Shipping, 25 Bundle 14 x 6 x 6 kraft corrugated kraft 25
1477 14x7x7 ECT-32 Kraft Corrugated Boxes - Long Item Shipping, 25-Pack 14 x 7 x 7 kraft corrugated kraft 25
1664 16x6x4 ECT-32 Kraft Corrugated Boxes - Easy Pack Long Design, 25 Bundle 16 x 6 x 4 kraft corrugated kraft 25

Open a product page for current pricing and availability.

How To Choose

  • Start with the SKU row whose dimensions, material, color, and pack quantity match your current job.
  • Open the PDP before ordering when a field says not listed in current catalog data.
  • Use the bulk quote path for larger, recurring, mixed-SKU, or freight-sensitive purchases.

When Not To Use

  • Do not infer unlisted product specs from similar SKUs.
  • Do not use this page for regulated, food-contact, outdoor exposure, or load-rating requirements unless the exact SKU record verifies that requirement.

Substitutes and Accessories

Reorder or Bulk Quote

For reorders, use the linked PDP SKU or the reorder-by-SKU path. For larger or mixed orders, use the bulk quote path and include SKU, quantity, destination ZIP, and timing.

Related Paths

FAQ

Which products match this page?
The Catalog Matches table above lists verified in-stock SKUs for Boxes Mailers, with current dimensions, material, color, and pack quantity. Open a product page for full specs and current pricing.
What should I do when a field is not listed?
Do not infer it. Use the PDP or bulk quote path so the order can be checked against current catalog data.
Can I request a quote instead of ordering one SKU?
Yes. Use the bulk quote path with the relevant SKU list, quantities, destination ZIP, and required timing.

3086 Results

showing boxes & mailers products

IN STOCK Professional 17x21
Envelopes & Mailers

17x21" Kraft Chipboard Stayflats Mailers - Tab Lock, Case of 50

PN: RM7

17 x 21 in .036 Chipboard 50 PER CASE
$58.70 / CASE
IN STOCK Protect high-value shipments with 18 x 13
Envelopes & Mailers

18 x 13" Kraft Chipboard Stayflats Tab Lock Mailers - 100/Case

PN: RM6

18 x 13 in .036 Chipboard 100 PER CASE
$73.71 / CASE
IN STOCK Rigid .036 kraft chipboard stayflats mailers with integrated tab lock closure–no additional stiffeners needed. Perfect for e-commerce brands shipping photos, documents, and flat goods. Lightweight design reduces postage costs while maintaining professional presentation. Sold by the case of 100.
Envelopes & Mailers

15 x 12.75 Kraft Chipboard Stayflats Mailers - Tab Lock, Case of 100

PN: RM4

15 x 12.75 in .036 Chipboard 100 PER CASE
$67.51 / CASE
IN STOCK Professional-grade 11x16
Envelopes & Mailers

11x16" Kraft Stayflats Tab Lock Mailers - Rigid Protection, Case/100

PN: RM8

11 x 16 in .036 Chipboard 100 PER CASE
$71.07 / CASE
IN STOCK Professional-grade 11x13.5
Envelopes & Mailers

11x13.5" Kraft Stayflats Tab Lock Mailers - Puncture Resistant, 100/Case

PN: RM3

11 x 13 1/2 in .036 Chipboard 100 PER CASE
$58.73 / CASE
IN STOCK Protect documents, photos, and merchandise with professional-grade 9 3/4 x 12 1/4
Envelopes & Mailers

9 3/4 x 12 1/4" Kraft Stayflats Tab Lock Mailers - 100/Case

PN: RM5

9 3/4 x 12 1/4 in .036 Chipboard 100 PER CASE
$48.23 / CASE
IN STOCK Protect high-value shipments with our 9x11.5
Envelopes & Mailers

9x11.5" Kraft Stayflats Tab Lock Mailers - Chipboard Flat Mailers, Case of 100

PN: RM2

9 x 11 1/2 in .036 Chipboard 100 PER CASE
$46.37 / CASE
IN STOCK Protect your shipments with these professional-grade 8x6
Envelopes & Mailers

8x6" Kraft Stayflats Mailers - Tab Lock, .036 Chipboard, Case/100

PN: RM1

8 x 6 in .036 Chipboard 100 PER CASE
$29.12 / CASE
IN STOCK Professional-grade 27 x 20
Envelopes & Mailers

27 x 20" Kraft Self-Seal Stayflats Plus Mailers - Puncture Resistant, Case of 50

PN: RM12PSK

27 x 20 in .028 Chipboard 50 PER CASE
$129.58 / CASE
IN STOCK Professional-grade 18x24
Envelopes & Mailers

18x24" Kraft Self-Seal Stayflats Plus Mailers - Puncture Resistant, Case of 50

PN: RM11PSK

18 x 24 in .028 Chipboard 50 PER CASE
$97.83 / CASE
IN STOCK Professional-grade 21x17
Envelopes & Mailers

21x17" Kraft Self-Seal Stayflats Plus Mailers - Puncture Resistant, Case of 100

PN: RM7K

21 x 17 in .028 Chipboard 100 PER CASE
$138.54 / CASE
IN STOCK Professional-grade 13 x 18
Envelopes & Mailers

13 x 18" Kraft Self-Seal Stayflats Plus Mailers - Case of 100

PN: RM6K

13 x 18 in .028 Chipboard 100 PER CASE
$92.08 / CASE
IN STOCK Protect your products with these 12 3/4 x 15
Envelopes & Mailers

12 3/4 x 15" Kraft Self-Seal Stayflats Plus Mailers - 100 Count

PN: RM4K

12 3/4 x 15 in .028 Chipboard 100 PER CASE
$77.96 / CASE
IN STOCK Heavy-duty 11x13.5
Envelopes & Mailers

11x13.5" Kraft Self-Seal Stayflats Plus Mailers - 100 Case

PN: RM3K

11 x 13 1/2 in .028 Chipboard 100 PER CASE
$65.52 / CASE
IN STOCK Professional-grade kraft self-seal stayflats plus mailers protect documents and photos with .028 chipboard construction and reliable peel-and-seal closure. 9.75
Envelopes & Mailers

9.75x12.25" Kraft Self-Seal Stayflats Plus Mailers - 100/Case

PN: RM5K

9 3/4 x 12 1/4 in .028 Chipboard 100 PER CASE
$54.60 / CASE
IN STOCK Professional-grade 9 x 11.5
Envelopes & Mailers

9 x 11.5" Kraft Self-Seal Stayflats Plus Mailers - 100ct Case

PN: RM2K

9 x 11 1/2 in .028 Chipboard 100 PER CASE
$52.78 / 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 needs, send support the details before placing a large order.

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 calculator -> Contact support for larger orders -> Compare corrugated box types -> View products below ->

Buying FAQ

What should I check before buying Boxes & Mailers?

Compare Inside dimensions, Board grade or strength rating, Box style and closure, Case or bundle quantity before choosing a product from this collection.

Can I buy Boxes & Mailers online?

Use the product grid to open a product page, confirm the SKU, quantity, unit, availability, and price, then add available products to cart.

When should I contact support?

Contact support for pallet, recurring, mixed-SKU, or uncertain-fit orders, or when the product page does not answer the size, quantity, or delivery question.