Our rankings are generated through the algorithmic analysis of thousands of customer reviews about products, brands, merchant customer service levels, popularity trends, and more. We use advanced technology, including AI, to help process and organize this information at scale, supporting our analysis with greater speed and consistency. The rankings reflect our opinion and should be a good starting point for shopping.
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10 Best 9 x 12 self seals of 2026
Save up to 23% off
Best Choice1
Spartan Industrial9.9Exceptional
9" X 12" (1000 Count) Self Seal Clear Poly Bags with Suffocation Warning
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Value for Money2
Columbian9.8Exceptional
Columbian 9 x 12 Security Envelopes, 100/Box, 9 x 12 Inches, Release & Seal Self Seal, SimplySafe Tamper Evident Pull Strip, White (COLO930)
22% Off-
product dimensions:7 x 3 x 0.1 inches 4.05 Pounds
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country of origin:USA
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asin:B08TRNHQWP
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date first available:November 11, 2017
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item model number:COLO930
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Columbian9.7Exceptional
Columbian 9 x 12 Catalog Envelopes, 30 Pack, Document Envelopes with Self Seal Closure, Heavyweight 28 lb Paper, Self Sealing Envelopes for Mailing, Filing and Organizing, Brown Kraft
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product dimensions:12.13 x 9.13 x 0.1 inches; 1.15 Pounds
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country of origin:N/A
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asin:B0CPQ6NSLS
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date first available:December 7, 2023
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item model number:COLO401
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Aimoh9.5Excellent
Aimoh 9x12 Self-Seal Brown Mailing Envelopes, Manilla Envelopes, 28lb 100ct
19% Off-
product dimensions: 12.01 x 9 x 0.04 inches
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sheet size: 9-x-12-inch
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color: Yellow
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shape: Rectangular
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item weight: 3.85 pounds
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5
Amazon Basics9.3Excellent
Amazon Basics Catalog Self Seal Mailing Envelopes for Documents, Peel and Seal, 9" x 12", Brown Kraft, 250-Pack
23% Off Limited Time Deal-
product dimensions: 13 x 9 x 8 inches
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country of origin:N/A
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asin:B06WLH1JQJ
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date first available:July 31, 2017
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item model number: AMZA31
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Aimoh9.0Excellent
Aimoh 9 x 12 Self-Seal Security White Envelopes 9x12 Large Envelopes 100ct
13% Off-
product dimensions: 9 x 12 x 2.5 inches
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country of origin:N/A
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asin:B01LZ4HHZE
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date first available:September 25, 2016
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item model number: FBA 38100
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Columbian8.9Very Good
Columbian 9 x 12 Catalog Envelopes with Self Seal Closure, 28 lb Brown Kraft, for Mailing Flat Letter Size Documents or Photos, 100 Per Box (COLO341)
12% Off
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8
Goefun8.8Very Good
Goefun 9x12 Manilla Envelopes, White, 25 Pack
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FloraSea8.5Good
25 Pack Catalog Mailing Envelopes, 9 x12 Inches Self-Seal Manilla Envelopes
14% Off
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10
Nobranded8.4Good
Nobranded 50 pcs Clear 9" x 12" Self Seal Cello Cellophane Bags Resealable Poly Bags 2.8 mils OPP Bag for Packaging Clothing, T Shirts, Art Painting,Treats,Party Favors,Gifts,Small Business
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