10 Best flap envelopes of 2025

Save up to 39% off

Best Choice

1

Blue Summit Supplies

Blue Summit Supplies 500 Number 10 Envelopes Self Seal - Number 10 Business Envelopes Letter Size - Security Tint - Flip and Seal Flap - 4 1/8 x 9 1/2-500 Count
9.7

Exceptional

Our Rating
How do we rank?

Powerful technology We scan thousands of products and stores, analyzing reviews to find what matters most to users like you

Careful review Our team ensures quality, value, and fit based on real user feedback

Trusted insights AI and human analysis guide your decisions, reflecting real user priorities
Real users impact

Thousands of users trust our site daily

Based on millions of stores and reviews

Shoppers influence our rankings
Analyzing top stores
Value for Money

2

Quality Park
Quality Park 9 x 12 Clasp Envelopes with Deeply Gummed Flaps, Great for Filing, Storing or Mailing Documents, 28 lb Brown Kraft, 100 per Box (QUA37890)

20% Off
Main highlights

Heavy Duty Kraft Envelopes
Quality Park 9x12 clasp envelopes feature double prong metal clasps, reinforced eyelets, and gummed seals, providing durability for home, office, and school use.

Ideal for Mailing Large Items
Perfect for sending large lay-flat items without folds or creases, such as contracts, catalogs, registration packets, and 8x10 photos.

Praised for Durability
Customers appreciate the strong clasps and the ability to handle frequent use without breaking, making them reliable for everyday office tasks.
Key specs
- size:9 x 12 Inches
- color:Light Brown
- shape:Rectangular
- material:Brown kraft
- closure:Gummed
9.5

Excellent

Our Rating

9.9
worth the money

9.7
Durability

9.5
Simple to use
3

Mead
Mead #10 Envelopes, Security Printed Lining for Privacy, Gummed Closure, All-Purpose 20-Ib Paper, 4-1/8" x 9-1/2", White, 40 Letter Size Envelopes per Box (75214)

30% Off
Main highlights

Privacy Protection
Security lining maintains document confidentiality during mailing.

Ideal for Standard Mail
Perfect for mailing standard letter size documents efficiently.

Customer Favorite Feature
Customers appreciate the durable, high-quality paper and secure closure.
Key specs
- size:40/Box
- color:White
- shape:Rectangular
- material:Paper
- closure:Gummed
9.3

Excellent

Our Rating
4

Mr. Pen

Mr. Pen- Clear Plastic Envelopes with Snap Closure, 10 Pack, A4, Letter Size, Colorful Flaps, Clear Folders for Documents Plastic Envelopes for Documents
9.1

Excellent

Our Rating
5

Ribetween

50 Packs of A7 Envelopes for Invitation, White 5x7 Envelopes with V Flap, Great for Graduation, Invitation, Baby Shower, Wedding and RSVP Cards (White)
8.8

Very Good

Our Rating
See Today’s Deals & Prices
6

Wishop

50 Pack #10 Business Envelopes Standard V Flap Invoices Envelopes for Office Checks, Business Letterhead, Letter Mailing 4.13 x 9.49 Inches (10 Colors)
8.5

Good

Our Rating
7

Columbian

Columbian Catalog Envelopes, 6 x 9, Release & Seal Self-Sealing Closure, 28 lb White Wove, 100 per Box (COLO652)
8.4

Good

Our Rating
8

Mead
Mead #10 Envelopes, Security Printed Lining for Privacy, Press-It Seal-It Self Adhesive Closure, All-Purpose 20-lb Paper, 4-1/8" x 9-1/2", White, 45 per Box (75026)

37% Off
Main highlights

Self Adhesive Seal for Convenience
White envelopes with self-adhesive seal and security lining for privacy, measuring 4 1/8 inches x 9 1/2 inches. 45 envelopes per box.

Ideal for Secure Mailings
Perfect for mailing sensitive documents like checks, ensuring privacy and security with its security lining and adhesive seal.

Most Praised Feature - No Need to Lick
Customers appreciate the convenience of the self-adhesive seal, eliminating the need to lick the envelopes for sealing.
8.3

Good

Our Rating

9.9
Simple to use

9.7
Security

9.3
materials Quality
9

Toperd

50 Pack A7 Colorful 5x7 Envelopes V Flap Invitation Envelopes for 5x7 Cards, Birthday, Weddings, Graduations, Greeting Cards, Baby Shower 5.24 x 7.24 Inches (Pink)
8.2

Good

Our Rating
10

Amazon Basics
Amazon Basics Quality #6 3/4 Security-Tinted Envelopes with Peel and Seal, 300-Pack, White

39% Off
Main highlights

Peel & Seal Closure
300-pack of 6 envelopes with Peel & Seal closure, no moisture needed. 24-pound white woven paper for quality and strength.

Ideal for Confidential Documents
Perfect for securely sending checks, invoices, or other confidential documents. Interior security tint keeps content private.

High Quality and Value
High quality security envelopes praised for their thickness, adhesion, and privacy features. Well worth the reasonable price.
Key specs
- size:300-Pack
- color:White
- shape:Rectangular
- material:24-pound white woven paper
- closure:Peel & Seal
8.1

Good

Our Rating

9.9
worth the money

9.7
Security

9.5
materials Quality

10 Best flap envelopes of 2025

1

Blue Summit Supplies 500 Number 10 Envelopes Self Seal - Number 10 Business Envelopes Letter Size - Security Tint - Flip and Seal Flap - 4 1/8 x 9 1/2-500 Count

How do we rank?

How do we rank?

Analyzing top stores

2

Quality Park 9 x 12 Clasp Envelopes with Deeply Gummed Flaps, Great for Filing, Storing or Mailing Documents, 28 lb Brown Kraft, 100 per Box (QUA37890)

9.9

9.7

9.5

3

Mead #10 Envelopes, Security Printed Lining for Privacy, Gummed Closure, All-Purpose 20-Ib Paper, 4-1/8" x 9-1/2", White, 40 Letter Size Envelopes per Box (75214)

4

Mr. Pen- Clear Plastic Envelopes with Snap Closure, 10 Pack, A4, Letter Size, Colorful Flaps, Clear Folders for Documents Plastic Envelopes for Documents

5

50 Packs of A7 Envelopes for Invitation, White 5x7 Envelopes with V Flap, Great for Graduation, Invitation, Baby Shower, Wedding and RSVP Cards (White)

6

50 Pack #10 Business Envelopes Standard V Flap Invoices Envelopes for Office Checks, Business Letterhead, Letter Mailing 4.13 x 9.49 Inches (10 Colors)

7

Columbian Catalog Envelopes, 6 x 9, Release & Seal Self-Sealing Closure, 28 lb White Wove, 100 per Box (COLO652)

8

Mead #10 Envelopes, Security Printed Lining for Privacy, Press-It Seal-It Self Adhesive Closure, All-Purpose 20-lb Paper, 4-1/8" x 9-1/2", White, 45 per Box (75026)

9.9

9.7

9.3

9

50 Pack A7 Colorful 5x7 Envelopes V Flap Invitation Envelopes for 5x7 Cards, Birthday, Weddings, Graduations, Greeting Cards, Baby Shower 5.24 x 7.24 Inches (Pink)

10

Amazon Basics Quality #6 3/4 Security-Tinted Envelopes with Peel and Seal, 300-Pack, White

9.9

9.7

9.5

Sign up and get exclusive special deals