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5 Best Flat Mailers of 2026

Last Updated - 2026/04/17

1
Best Choice

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Cheardia

Cheardia 120 Pack Photo Document Mailers with Self Adhesive Seal, 13 x 9.25 Inch Rigid Mailers Stay Flat Cardboard Envelope with Label for CD, Photos, White

Cheardia

CA$35.99

More Details
Main highlights
- Universal Shipping Solution:Essential for sellers, offices, and home use – ideal for mailing photos, documents, and flat valuables via all carriers
- Precision-Fit Design: Optimized dimensions accommodate CDs, booklets, invitations, and manuals while preventing shifting during transit
- Heavy-Duty Protection: Constructed with 1mm-thick 290gsm paperboard (48g/mailer) – crush-resistant barrier shields photos, blueprints, and delicate prints
- Easy to peal & seal: Peel-and-press adhesive flap requires no tape; tear strip enables effortless package opening without damaging contents
- 120-Pack Ready-to-Ship Bundle:Includes self-seal mailers 13" x 9.25" / 33 x 23.5 cm + "DO NOT BEND" labels – perfectly fits 8.75" x 12.5" / 22 x 31.7 cm artwork, certificates, and A4 documents
CA$35.99
2

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

zmybcpack

zmybcpack 100 Pack 7x9 inch Self Seal Rigid Mailer Stay Flat Cardboard Mailers, White Cardboard Shipping Envelopes White Photo Document Mailers for CD, Photos, Document

zmybcpack

CA$34.99

More Details
Main highlights
- These Seal Photo Document Mailer are ideal for post offices, logistic shipping companies, packaging wholesalers, mail order companies, office stationery suppliers, online stores, home or personal use.
- Package contains: 100 pack 7X9 inch Self Seal Photo Document Mailers.
- Material: Made of high quality 400gsm paperboard material.
- Easy to peal & seal: Easy to peel and seal with a strong flap adhesive, no need extra licking of glue or water to moisten. Tear strip design for photo mailer also helps you open its package without struggle.
- Document Mailers Size: 7X9 inch (17.78 x 22.86 cm). Perfect size for art prints, photos, CDs, certificates, documents, paper, handbook, catalogue, literature, sheets, manual, booklets, invitations, blueprint, etc.
CA$34.99
3

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

zmybcpack

zmybcpack 50 Pack 9X12 inch Self Seal Photo Document Rigid Mailers Stay Flat White Cardboard Envelopes White Photography Mailers for CD, Photos, Document

zmybcpack

CA$32.99

More Details
Main highlights
- These Seal Photo Document Mailers are perfect for mailing soft goods, photographs, documents and printouts. Ideal choice post offices, logistic shipping companies, packaging wholesalers, mail order companies, office stationery suppliers, online stores, home or personal use
- Package contains: 50 pack 9X12 inch Self Seal Photo Document Mailers
- Material: Made of high quality paperboard material provides great stiffness and protection against tearing and punctures
- Easy to peal & seal: Easy to peel and seal with a strong flap adhesive, no need extra licking of glue or water to moisten. Tear strip design for photo mailer also helps you open its package without struggle
- Document Mailers Size: 9X12 inch. Perfect size for art prints, photos, CDs, certificates, A4 documents, paper, handbook, catalogue, literature, sheets, manual, booklets, invitations, blueprint, etc
CA$32.99
4
Best Value

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

zmybcpack

zmybcpack 50 Pack 9X12 inch Self Seal Photo Document Rigid Mailers Stay Flat White Cardboard Envelopes White Photography Mailers for CD, Photos, Document

zmybcpack

CA$32.99

More Details
Main highlights
- These Seal Photo Document Mailers are perfect for mailing soft goods, photographs, documents and printouts. Ideal choice post offices, logistic shipping companies, packaging wholesalers, mail order companies, office stationery suppliers, online stores, home or personal use
- Package contains: 50 pack 9X12 inch Self Seal Photo Document Mailers
- Material: Made of high quality paperboard material provides great stiffness and protection against tearing and punctures
- Easy to peal & seal: Easy to peel and seal with a strong flap adhesive, no need extra licking of glue or water to moisten. Tear strip design for photo mailer also helps you open its package without struggle
- Document Mailers Size: 9X12 inch. Perfect size for art prints, photos, CDs, certificates, A4 documents, paper, handbook, catalogue, literature, sheets, manual, booklets, invitations, blueprint, etc
CA$32.99
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

zmybcpack

zmybcpack 100 Pack 7x9 inch Self Seal Rigid Mailer Stay Flat Cardboard Mailers, White Cardboard Shipping Envelopes White Photo Document Mailers for CD, Photos, Document

zmybcpack

CA$34.99

More Details
Main highlights
- These Seal Photo Document Mailer are ideal for post offices, logistic shipping companies, packaging wholesalers, mail order companies, office stationery suppliers, online stores, home or personal use.
- Package contains: 100 pack 7X9 inch Self Seal Photo Document Mailers.
- Material: Made of high quality 400gsm paperboard material.
- Easy to peal & seal: Easy to peel and seal with a strong flap adhesive, no need extra licking of glue or water to moisten. Tear strip design for photo mailer also helps you open its package without struggle.
- Document Mailers Size: 7X9 inch (17.78 x 22.86 cm). Perfect size for art prints, photos, CDs, certificates, documents, paper, handbook, catalogue, literature, sheets, manual, booklets, invitations, blueprint, etc.
CA$34.99

5 Best Flat Mailers of 2026

Cheardia 120 Pack Photo Document Mailers with Self Adhesive Seal, 13 x 9.25 Inch Rigid Mailers Stay Flat Cardboard Envelope with Label for CD, Photos, White

zmybcpack 100 Pack 7x9 inch Self Seal Rigid Mailer Stay Flat Cardboard Mailers, White Cardboard Shipping Envelopes White Photo Document Mailers for CD, Photos, Document

zmybcpack 50 Pack 9X12 inch Self Seal Photo Document Rigid Mailers Stay Flat White Cardboard Envelopes White Photography Mailers for CD, Photos, Document

zmybcpack 50 Pack 9X12 inch Self Seal Photo Document Rigid Mailers Stay Flat White Cardboard Envelopes White Photography Mailers for CD, Photos, Document

zmybcpack 100 Pack 7x9 inch Self Seal Rigid Mailer Stay Flat Cardboard Mailers, White Cardboard Shipping Envelopes White Photo Document Mailers for CD, Photos, Document

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