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10 Best flight security envelopes of 2026

Save up to 39% off
  • Best Choice

    1

    Top Flight PSTF10NWT #10 Envelopes, Strip & Seal, Security Tinted, White Paper, 24 lb, 500 Count
    Top Flight
    9.9
    Exceptional

    Top Flight PSTF10NWT #10 Envelopes, Strip & Seal, Security Tinted, White Paper, 24 lb, 500 Count

    • product dimensions: 11.8 x 10 x 4.3 inches
    • sheet size: 24
    • color: White
    • shape: Rectangular
    • item weight: 6 pounds
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  • Value for Money

    2

    Top Flight Number 10 Boxed Security Envelopes, Strip and Seal Closure, 4 1/8 x 9 1/2 Inches, White, 45 Envelopes per Box (6900120)
    Top Flight
    9.8
    Exceptional

    Top Flight Number 10 Boxed Security Envelopes, Strip and Seal Closure, 4 1/8 x 9 1/2 Inches, White, 45 Envelopes per Box (6900120)

  • 3

    Top Flight PSTF10NWT #10 Envelopes,Strip & Seal,Security Tinted,White Paper,24 lb,500 Count (Pack of 2)
    Top Flight
    9.7
    Exceptional

    Top Flight PSTF10NWT #10 Envelopes,Strip & Seal,Security Tinted,White Paper,24 lb,500 Count (Pack of 2)

  • 4

    Mead #10 Security Business Envelopes Letter Size 4-1/8" x 9-1/2" – Peel and Seal, Privacy Lined, No-Window, Press-It Seal-It Self-Adhesive for Home & Office Mailing, 45 Count (75026)
    Mead
    9.6
    Exceptional

    Mead #10 Security Business Envelopes Letter Size 4-1/8" x 9-1/2" – Peel and Seal, Privacy Lined, No-Window, Press-It Seal-It Self-Adhesive for Home & Office Mailing, 45 Count (75026)

    23% Off
    • product dimensions: 9.7 x 1.5 x 4.3 inches
    • sheet size: 4.125-x-9.5-inch
    • color: White
    • shape: Rectangular
    • item weight: 0.3 ounces

  • 5

    Quality Park #6 3/4 Self-Seal Security Envelopes, Security Tint and Pattern, Redi-Strip Closure, 24-lb White Wove, 3-5/8 x 6-1/2, 100/Box (QUA10417)
    Quality Park
    9.5
    Excellent

    Quality Park #6 3/4 Self-Seal Security Envelopes, Security Tint and Pattern, Redi-Strip Closure, 24-lb White Wove, 3-5/8 x 6-1/2, 100/Box (QUA10417)

    • product dimensions:‎6.63 x 3.75 x 2.44 inches
    • sheet size:N/A
    • color:‎White
    • shape:‎Rectangular
    • item weight:‎12.3 ounces
  • See Today’s Deals & Prices

  • 6

    Amazon Basics #10 Security-Tinted Self-Seal Business Envelopes for Documents, Privacy, Home & Office, White, 500-Pack
    Amazon Basics
    9.2
    Excellent

    Amazon Basics #10 Security-Tinted Self-Seal Business Envelopes for Documents, Privacy, Home & Office, White, 500-Pack

    • product dimensions: 12.2 x 9.9 x 4.13 inches
    • sheet size:N/A
    • color: Tint
    • shape: Rectangular
    • item weight: 6.47 pounds

  • 7

    Aimoh#10 Business Envelopes Letter Size Windowless Self Seal Security 500ct
    Aimoh
    9.0
    Excellent

    Aimoh#10 Business Envelopes Letter Size Windowless Self Seal Security 500ct

    22% Off Limited Time Deal
    • product dimensions: 11.5 x 10 x 4.25 inches
    • sheet size: 4.125-x-9.5-inch
    • color: Self-Seal
    • shape: Rectangular
    • item weight: 6.85 pounds

  • 8

    Mead #10 Envelopes, Letter Size, 4-1/8" x 9-1/2", Security Printed Lining for Privacy, Gummed Closure, Windowless, White All-Purpose for Home & Office Mail, 40 Count (75214)
    Mead
    8.9
    Very Good

    Mead #10 Envelopes, Letter Size, 4-1/8" x 9-1/2", Security Printed Lining for Privacy, Gummed Closure, Windowless, White All-Purpose for Home & Office Mail, 40 Count (75214)

    39% Off

  • 9

    Quality Park #10 Security Envelopes, No Window, Redi-Strip Self Seal Envelopes, 24-lb White Wove, 4-1/8" x 9-1/2", 100 per Box (QUA69117)
    Quality Park
    8.8
    Very Good

    Quality Park #10 Security Envelopes, No Window, Redi-Strip Self Seal Envelopes, 24-lb White Wove, 4-1/8" x 9-1/2", 100 per Box (QUA69117)

    • product dimensions: 7 x 3 x 0.1 inches
    • sheet size:N/A
    • color: White
    • shape: Rectangular
    • item weight: 14.6 ounces

  • 10

    Mead Press-It Seal-It #6 3/4 Security Envelopes, 55 Count (75030)
    Mead
    8.7
    Very Good

    Mead Press-It Seal-It #6 3/4 Security Envelopes, 55 Count (75030)

    25% Off