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Fiberboard Mailers

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Fiberboard mailers are sturdy envelopes made of paperboard and other types of cardboard. Compared to regular paper envelopes, these are thicker and have more rigid structures. These features make them ideal for mailing documents, books, calendars, artwork, and photographs. Staples® has a varied selection of fiberboard envelopes and shipping boxes as well as a large inventory of mailing supplies for business and home use.

Choose the Right Fiberboard Mailers for Your Package
The rigid construction of fiberboard envelopes protects their contents from creasing, crushing, and bending. Also known as Stay Flat® mailers, they are perfect for sending out flat items like paper documents. Besides fiberboard, materials commonly used for this class of envelopes include corrugated paperboard and kraft paper. These are tough, tear-resistant materials that can withstand the rigors of shipping better than regular paper envelopes.

Paperboard mailers are also available as padded envelopes and corrugated fiberboard boxes. These designs are ideal for shipping fragile items like CD/DVDs, jewelry, and small electronics. The cushioning of padded mailers prevents soft goods from jostling around in their packages and protects against breakage. Most of such envelopes use bubble packing but plastic foam and shredded newsprint can also serve as padding. The fluted walls of corrugated mailers serve as padding and make these boxes crush-resistant.

Key Features to Consider When Shopping for Mailers
Paperboard mailers come in different sizes ranging from small ones measuring 6 x 9 inches and 6 x 8 inches to large units with sizes between 9 x 12 inches and 13 x 18 inches. Consider the size of the items you wish to send when selecting a mailer size. Mailer design is another important factor to consider. Design aspects to note include envelope orientation as well as flap and seal types.

Pocket-type cardboard mailers have their opening flaps on their short sides while wallet-styled ones place those on their longer edges. While top-opening units are more common, side-opening ones make inserting and retrieving paper documents easier. With regards to flaps and seals, the most common options are gummed, peel-and-seal, and self-sealing tear tabs. Alternatives include locking tabs that use cutouts, clasps, and button and string for closure. Tear tabs are more secure. Choose envelopes with this closure for private documents. Locking ones make mailers reusable and are best for non-confidential contents.

Should You Consider GSM When Selecting Fiberboard Mailers?
GSM (grams per square meter), or grammage, is a unit of paper thickness. The higher the GSM of a paper product, the thicker, and more durable, it is. A regular paper envelope has a GSM value of 100 or less while premium varieties may use up to 180gsm paper. Grammage for fiberboard envelopes is 250gsm or higher. Since these mailers are strong enough for the paper and small items usually shipped in envelopes, there’s no need to consider their GSM ratings when shopping for them.

What Are Gusseted Mailers?
Gusseted stay flat mailers are expandable envelopes with collapsible sides. These can carry flat documents as well as bulky items like catalogs and books. The concertina design and expanding sides provide additional room to fit extra items.

Are Kraft Mailers the Same as Manila Envelopes?
No. While both of them usually come in brown, kraft mailers are made of fiberboard with higher tear resistance than manila paper. Kraft mailers are also available in white.
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LUX Mailers (9 1/2 x 12 1/2) 50/Box, Natural Linen (LUXMLR-NLI-50)
Item: 2444557 / Model : LUXMLR-NLI-50
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  • LUX Mailers (9 1/2 x 12 1/2) are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Natural Linen, 100lb. Text Paper
  • Dimensions: 9 1/2"L x 12 1/2"W
146.99 $146.99
50/Pack
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Staples® QuickStrip™ StayFlat White Mailers
Item: SS992808
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  • QuickStrip closure is quick and easy to use - simply remove strip and press to close
  • Rigid chipboard construction protects contents from bending and crushing
  • Attractive white mailers provide a clean and professional appearance
As low as 17.49 $17.49
Multiple options available
Staples® StayFlat® White Mailers
Item: SS992805
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  • Rigid chipboard construction protects contents from bending and crushing
  • Economical locking tabs secure contents
  • Attractive white mailers provide a clean and professional appearance
As low as 31.99 $31.99
Multiple options available
Staples® StayFlat® Kraft Mailers
Item: SS992802
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  • Rigid chipboard construction protects contents from bending and crushing
  • Economical locking tabs secure contents
  • Lightweight mailers reduces postage costs
As low as 48.99 $48.99
Multiple options available
12 1/2" x 9 1/2" x 1" Gusseted Stayflats Mailers, White, 100/Ct (RM2G)
Item: 473223 / Model : ENVRM2G
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  • Overall Mailer Dimensions: 12 1/2"W x 9 1/2"L
  • Self-seal adhesive strip seals mailer securely and provides a tamper-evident closure
  • Lightweight mailers reduces postage costs
117.09 $117.09
100/Carton
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LUX Mailers (9 1/2 x 12 1/2) 50/Box, Navy (LUXMLR-103-50)
Item: 2444552 / Model : LUXMLR-103-50
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  • Comes in Navy, 100lb. Text Paper
  • Closure type: Peel & Seal
  • Peel & Press Sealing Method
46.99 $46.99
50/Pack
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5 1/8" x 5" Fiberboard CD Mailers, White, 100/Case (MM1145)
Item: 947656 / Model : MM1145
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  • Overall Dimensions: 5 1/8"L x 5"W
  • 100/Carton
  • Manufactured from 100% recycled paperboard.
162.79 $162.79
100/Carton
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LUX 6 x 9 Colored Paperboard Mailers 500/Box, Electric Green (69PBM-G-500)
Item: 2444581 / Model : 69PBM-G-500
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  • 6 x 9 Colored Paperboard Mailers are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Electric Green, 18pt. Text Paper
  • Dimensions: 6"L x 9"W
580.59 $580.59
500/Pack
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LUX 6 x 9 Colored Paperboard Mailers 50/Box, Bright Fuchsia (69PBM-BF-50)
Item: 2444586 / Model : 69PBM-BF-50
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  • 6 x 9 Colored Paperboard Mailers are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Bright Fuchsia, 18pt. Text Paper
  • Dimensions: 6"L x 9"W
187.99 $187.99
50/Pack
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LUX 6 x 9 Colored Paperboard Mailers 250/Box, Midnight Black (69PBM-MB-250)
Item: 2444575 / Model : 69PBM-MB-250
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  • 6 x 9 Colored Paperboard Mailers are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Midnight Black, 18pt. Text Paper
  • Dimensions: 6"L x 9"W
879.99 $879.99
250/Pack
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Staples® QuickStrip™ StayFlat® Kraft Mailers
Item: SS992809
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  • QuickStrip closure is quick and easy to use - simply remove strip and press to close
  • Rigid chipboard construction protects contents from bending and crushing
  • Convenient tear-tab opens easily without harming contents
As low as 35.99 $35.99
Multiple options available
LUX Mailers (9 1/2 x 12 1/2) 250/Box, Midnight Black (LUXMLR-B-250)
Item: 2444559 / Model : LUXMLR-B-250
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  • LUX Mailers (9 1/2 x 12 1/2) are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Midnight Black, 100lb. Text Paper
  • Dimensions: 9 1/2"L x 12 1/2"W
549.99 $549.99
250/Pack
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LUX Mailers (9 1/2 x 12 1/2) 50/Box, Gold Metallic (LUXMLR-M07-50)
Item: 2444473 / Model : LUXMLR-M07-50
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  • LUX Mailers (9 1/2 x 12 1/2) are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Gold Metallic, 105lb. Text Paper
  • Dimensions: 9 1/2"L x 12 1/2"W
184.99 $184.99
50/Pack
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LUX 6 x 9 Colored Paperboard Mailers 1000/Box, Electric Green (69PBM-G-1000)
Item: 2444584 / Model : 69PBM-G-1000
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  • 6 x 9 Colored Paperboard Mailers are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Electric Green, 18pt. Text Paper
  • Dimensions: 6"L x 9"W
1249.99 $1,249.99
1000/Pack
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Staples DVD Literature Mailer Kit
Item: SS1084374
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  • Insert holds DVD safely in place
  • Strong 200#/ECT-32-B oyster white construction
  • No tape or glue needed for assembly
As low as 67.89 $67.89
Multiple options available
Staples Kraft Utility Flat Mailers
Item: SS1084534
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  • Environmentally-friendly mailers are made from 100% recycled paperboard and are 100% recyclable
  • Features convenient side-loading design, pressure sensitive closure and tear strip for easy opening
  • Ideal for mailing soft goods, photographs, documents and promotional items
As low as 100.99 $100.99
Multiple options available
LUX Mailers (9 1/2 x 12 1/2) 250/Box, White Linen (LUXMLR-WLI-250)
Item: 2444506 / Model : LUXMLR-WLI-250
Add to Favorites
  • LUX Mailers (9 1/2 x 12 1/2) are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in White Linen, 100lb. Text Paper
  • Dimensions: 9 1/2"L x 12 1/2"W
205.79 $205.79
250/Pack
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LUX Mailers (9 1/2 x 12 1/2) 500/Box, Citrus (LUXMLR-L20-500)
Item: 2444476 / Model : LUXMLR-L20-500
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  • LUX Mailers (9 1/2 x 12 1/2) are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Citrus, 100lb. Text Paper
  • Dimensions: 9 1/2"L x 12 1/2"W
869.99 $869.99
500/Pack
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Staples® QuickStrip™ Side-Opening StayFlat® White Mailers
Item: SS1035124
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  • Side-open mailers allow for easier insertion and retrieval of contents
  • QuickStrip closure is quick and easy to use - simply remove strip and press to close
  • Rigid chipboard construction protects contents from bending and crushing
As low as 143.99 $143.99
Multiple options available
LUX 6 x 9 Colored Paperboard Mailers 50/Box, Midnight Black (69PBM-MB-50)
Item: 2444574 / Model : 69PBM-MB-50
Add to Favorites
  • 6 x 9 Colored Paperboard Mailers are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Midnight Black, 18pt. Text Paper
  • Dimensions: 6"L x 9"W
187.99 $187.99
50/Pack
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LUX Mailers (9 1/2 x 12 1/2) 250/Box, Silver Metallic (LUXMLR-M06-250)
Item: 2444544 / Model : LUXMLR-M06-250
Add to Favorites
  • LUX Mailers (9 1/2 x 12 1/2) are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Silver Metallic, 105lb. Text Paper
  • Dimensions: 9 1/2"L x 12 1/2"W
789.99 $789.99
250/Pack
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LUX Mailers (9 1/2 x 12 1/2) 50/Box, Pool (LUXMLR-102-50)
Item: 2444548 / Model : LUXMLR-102-50
Add to Favorites
  • LUX Mailers (9 1/2 x 12 1/2) are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Pool, 100lb. Text Paper
  • Dimensions: 9 1/2"L x 12 1/2"W
127.99 $127.99
50/Pack
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LUX Mailers (9 1/2 x 12 1/2) 500/Box, Chocolate (LUXMLR-17-500)
Item: 2444509 / Model : LUXMLR-17-500
Add to Favorites
  • LUX Mailers (9 1/2 x 12 1/2) are perfect for shipping fragile items, including jewelry/books/toys/electronics
  • Comes in Chocolate, 100lb. Text Paper
  • Dimensions: 9 1/2"L x 12 1/2"W
869.99 $869.99
500/Pack
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