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Corrugated Mailers

Protect your packages from the rigors of shipping by sending them in corrugated mailers. These mailers are boxes and large envelopes made of thick fiberboards. The walls of a corrugated mailer have a fluted inner board covered by one or two flat linerboards. Flutes are S-shaped arches that give a corrugated box its impressive structural strength. Staples® offers a wide selection of these sturdy, protective shipping boxes and envelopes.

Choosing the Right Corrugated Mailer for Your Package
The size of the item you wish to send will determine the type of corrugated mailer you need. You can send slim and small books as well as magazines, photos, and letters in corrugated envelopes. These corrugated document mailers ship flat and are stiff enough to get printed pages to their destinations without creases and are a strong alternative to plain window envelopes. For bigger items, you need larger mailers like corrugated boxes. These are ideal for shipping fragile items and bulky goods. They come in different sizes and styles. Their fluted walls provide ample stacking strength while insulating their contents from moisture, extreme temperatures, and physical damage.

Consider Board Strength When Comparing Corrugated Mailers
Manufacturers use different tests to determine the strengths of corrugated boxes. The most popular are the burst test and ECT or edge crust test. The wall thickness of a box determines its ECT score and burst strength. These then determine the maximum load capacity of the box. A single-walled corrugated mailer has a fluted layer between two linerboards. Boxes with burst strength ratings between 200 and 275 and ECT values between 23 and 55 pounds per square inch fall in this category. Double-walled mailers have two corrugated layers. They are stronger and offer better crush resistance. They can ship heavier items and come in strengths ranging from 200 to 600 pounds while scoring 42 to 82 on edge crush tests. Triple-walled boxes have three layers and can handle significantly higher weights. They are usually large containers for shipping heavy loads stacked on pallets.

What Is the Difference Between Corrugated and Cardboard Boxes?
While corrugated mailers feature fiberboard construction, cardboard boxes are made of paperboard. Regardless of its thickness, cardboard is a paper product while manufacturers use wood chips and shavings for corrugated boxes. A cardboard box also does not have an intermediate layer or fluted core.

What Are the Different Types of Corrugated Box Fluting?
There are five common types of corrugated box fluting designated by the letters: A, B, C, E, and F. An A-flute box has 30 to 36 flutes per linear foot with each one measuring 0.188 inches. B-flute boxes have 44 to 50 flutes that are 0.125 inches thick. Boxes with C flutes are the most common. Their flutes are intermediate in density and thickness between A and B flutes. E and F-flute boxes have more flutes but in much smaller sizes. Pizza boxes, sandwich packaging, and corrugated document mailers fall into these categories.

Are Linerboards Made of Chipboard?
No. Linerboards are usually made of recycled paper and kraft paperboard. Those made of kraft paper often appear brown. They can also come in white if made of bleached kraft paper. Linerboards do come in other colors besides white and brown. More Less
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  • Maximum protection for your most important documents
  • Manufactured from strong 200#/ECT32-B oyster white corrugated
  • Assembles in seconds
As low as 8.69 $8.69
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Staples® White Corrugated Document Mailers
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Item : SS940712
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  • Scored boxes with flaps that lock into place quickly and easily
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Staples Kraft Easy-Fold Mailers
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Item : SS1084529
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  • One-piece mailers have scores at multiple depths to ensure the proper fit for your products
  • Simply place product in the center, fold in the sides at your desired depth and seal with tape
  • Economical 200#/ECT-32-B Kraft corrugated construction, shipped flat and sold in bundle quantities
As low as 31.49 $31.49
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Item : SS988278
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  • All sizes are inside dimensions L x W x D(H).
  • Front locking tabs won't interfere with contents and provide a secure closure
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Item : SS1049188
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Item : 2102900 / Model : 5PSWB
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  • These mailers are the perfect way to protect photos and safely send them through the mail!
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  • Kraft Corrugated Mailers are light-weight to save on postage.
  • Perfect for shipping small, light-weight fragile items.
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UPS Shipping Services
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15 1/8" x 11 1/8" x 4" Deluxe Literature Mailers, 50/Bundle (MFL15114K)
15 1/8" x 11 1/8" x 4" Deluxe Literature Mailers, 50/Bundle (MFL15114K)
Item : 1004914 / Model : MFL15114K
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  • Maximum protection for your most important documents.
  • Manufactured from strong 200#/ECT32-B kraft corrugated.
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Item : 2103066 / Model : 28906706B
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  • These Mailers expand up to 1 inch & are the perfect way to protect photos and safely send them through the mail!
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  • This cardboard mailer measures at 12.5" x 9.5" x 1"
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JAM Paper® CD Size Bubble Mailers with Peel and Seal Closure, 6 x 6.5, Black Metallic, 12/pack (2744430)
JAM Paper® CD Size Bubble Mailers with Peel and Seal Closure, 6 x 6.5, Black Metallic, 12/pack (2744430)
Item : 261831 / Model : 2744430
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  • CD size
  • Size: 6" x 6 1/2"
  • Material: Plastic
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Item : 262789 / Model : 8866644
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  • Size: 11" x 13 1/2"
  • Closure: Peel & seal
  • Envelopes open on small side
1.69 $1.69
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1
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JAM Paper® Photo Mailer Stiff Envelopes with Self Adhesive Closure, 7 x 9, White, Sold Individually (1456649)
JAM Paper® Photo Mailer Stiff Envelopes with Self Adhesive Closure, 7 x 9, White, Sold Individually (1456649)
Item : 1433641 / Model : 1456649
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  • Size: 7" x 9"
  • Closure: Gummed
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1.5 $1.50
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JAM Paper® Photo Mailer Stiff Envelopes with Self Adhesive Closure, 9 x 11.5, White Recycled, 6/Pack (2PSWB)
JAM Paper® Photo Mailer Stiff Envelopes with Self Adhesive Closure, 9 x 11.5, White Recycled, 6/Pack (2PSWB)
Item : 2102902 / Model : 2PSWB
Add to Favorites
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9.89 $9.89
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Staples® QuickStrip™ Photo Mailers
Staples® QuickStrip™ Photo Mailers
Item : SS981719
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  • QuickStrip closure is quick and easy to use - simply remove strip and press to close
  • Rigid cardboard protects contents from bending
  • Handy pull tab prevents damage when mailer is opened and discourages tampering
As low as 4.99 $4.99
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JAM Paper® Photo Mailer Stiff Envelopes with Self Adhesive Closure, 17 x 21, White, Sold Individually (7PSW)
Item : 1433632 / Model : 7PSW
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  • Size: 17" x 21"
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  • Opening: Booklet
3.29 $3.29
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JAM Paper® Photo Mailer Stiff Envelopes with Self Adhesive Closure, 9 x 11.5, Brown Kraft Recycled, Sold Individually (8866643)
JAM Paper® Photo Mailer Stiff Envelopes with Self Adhesive Closure, 9 x 11.5, Brown Kraft Recycled, Sold Individually (8866643)
Item : 262787 / Model : 8866643
Add to Favorites
  • Size: 9" x 11 1/2"
  • Self adhesive, peel and seal closure to speed up the packing process
  • Made with classic brown kraft cardboard to keep pictures and artwork protected
1.69 $1.69
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JAM Paper® Photo Mailer Stiff Envelopes, Self Adhesive Closure, 9.75 x 12.25, Brown Kraft Recycled, Sold Individually (8866642)
JAM Paper® Photo Mailer Stiff Envelopes, Self Adhesive Closure, 9.75 x 12.25, Brown Kraft Recycled, Sold Individually (8866642)
Item : 262788 / Model : 8866642
Add to Favorites
  • Size: 9 3/4" x 12 1/4"
  • Closure: Peel & seal
  • Self adhesive, peel and seal closure to speed up the packing process
1.69 $1.69
Each
1
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JAM Paper® Photo Mailer Stiff Envelopes, Self Adhesive Closure, 12.75 x 15, Brown Kraft Recycled, Sold Individually (8866645)
JAM Paper® Photo Mailer Stiff Envelopes, Self Adhesive Closure, 12.75 x 15, Brown Kraft Recycled, Sold Individually (8866645)
Item : 262791 / Model : 8866645
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  • Size: 12 3/4" x 15"
  • Self adhesive, peel and seal closure to speed up the packing process
  • Made with classic brown kraft cardboard to keep pictures and artwork protected
2.19 $2.19
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