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5 Best Flat Mailers of 2026

Last Updated - 2026/03/13

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.

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
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.

RHBLME

100-PACK Stay Flat Mailers, Reusable Cardboard Envelopes, 6x10 Inch Self-Seal Mailers, White Rigid Shipping Envelopes, Use on School and Office, Great for Photo, Documents, Certificate, and More

RHBLME

CA$29.99

More Details
Main highlights
- ✅【WHAT YOU GET】You’ll receive 100-PACK white rigid mailers, and if you have any dissatisfaction with our products, you can choose to contact us to return or refund at any time, we will try our best to provide you with the best shopping experience. BUY IT ASAP!
- ✅【STAY FLAT CARDBOARD】Our white cardboard mailers are thick enough to protect your photos from bending and scratching; reduce the cost of shipping while simultaneously ensuring your items stay inside.
- ✅【SELF-SEAL RIGID MAILERS】The photo envelopes have an adhesive strip at the top to ensure contents remain inside while in transit; simply peel, seal, then press to adhere the two ends together.
- ✅【MULTI-PURPOSE RIGID ENVELOPES】Protect valuable art prints, photos, media, jewelry, and documents while shipping with these hard 6x10 envelopes, great for school or office.
- ✅【ENVELOPE DIMENSIONS】The rigid shipping envelopes measure 6 x 10 inches and can hold about 10 photos; use stickers, logos, and stamps to customize the envelopes for your small business.
CA$29.99

5 Best Flat Mailers of 2026

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 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

100-PACK Stay Flat Mailers, Reusable Cardboard Envelopes, 6x10 Inch Self-Seal Mailers, White Rigid Shipping Envelopes, Use on School and Office, Great for Photo, Documents, Certificate, and More

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100-PACK Stay Flat Mailers, Reusable Cardboard Envelopes, 6x10 Inch Self-Seal Mailers, White Rigid Shipping Envelopes, Use on School and Office, Great for Photo, Documents, Certificate, and More

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