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Best deal: $0.03 per count (52.0% below the median) — Columbian #10 Security Envelopes, 500 Pack, Self Seal Envelopes for...

Price range: $0.03 – $3.15 per count across 48 offers. Median sits at $0.06.

Top brands showing: Columbian Security, Mead Envelopes, Double Window.

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Columbian #10 Security Envelopes, 500 Pack, Self Seal Envelopes for Business Mailings, Tamper Evident, No Window, 4-1/8 x 9-1/2 Inches, Durable 24 lb White Paper

Columbian #10 Security Envelopes, 500 Pack, Self Seal Envelopes for Business Mailings, Tamper Evident, No Window, 4-1/8 x 9-1/2 Inches, Durable 24 lb White Paper

(as of 07/13/2026 10:39 EST)

$0.03 / count
Total: $13.92
Prime: ✅
Buy on Amazon
Amazon Basics #10 Security Tinted Business Envelopes for Documents and Invoices, Quality Seal, 4-1/8" x 9-1/2", White, Pack of 500

Amazon Basics #10 Security Tinted Business Envelopes for Documents and Invoices, Quality Seal, 4-1/8" x 9-1/2", White, Pack of 500

(as of 07/13/2026 10:39 EST)

$0.04 / count
Total: $18.88
Prime: ✅
Buy on Amazon
Top Flight PSTF10NWT #10 Envelopes, Strip & Seal, Security Tinted, White Paper, 24 lb, 500 Count

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

(as of 07/13/2026 10:39 EST)

$0.04 / count
Total: $19.99
Prime: ✅
Buy on Amazon
Columbian #9 Security Envelopes, 500 Pack, No Window Self Seal Envelopes for Business Mailings, 3-7/8" x 8-7/8", Durable 24 lb White Paper

Columbian #9 Security Envelopes, 500 Pack, No Window Self Seal Envelopes for Business Mailings, 3-7/8" x 8-7/8", Durable 24 lb White Paper

(as of 07/13/2026 10:39 EST)

$0.04 / count
Total: $20.91
Prime: ✅
Buy on Amazon
SUNEE #10 Security-Tinted Self Seal Envelopes – 500 Pack White Windowless Mailing Envelopes, 24LB Printer Friendly for Business, Home & Office Use (4-1/8 x 9-1/2")

SUNEE #10 Security-Tinted Self Seal Envelopes – 500 Pack White Windowless Mailing Envelopes, 24LB Printer Friendly for Business, Home & Office Use (4-1/8 x 9-1/2")

(as of 07/13/2026 10:39 EST)

$0.04 / count
Total: $20.99
Prime: ❌
Buy on Amazon
Columbian #8-5/8 Security Envelopes, 500 Pack, Double Window Self Seal Envelopes for QuickBooks Checks and Business Mailings, Tamper Evident, 3-5/8" x 8-5/8", Durable 24 lb White Paper

Columbian #8-5/8 Security Envelopes, 500 Pack, Double Window Self Seal Envelopes for QuickBooks Checks and Business Mailings, Tamper Evident, 3-5/8" x 8-5/8", Durable 24 lb White Paper

(as of 07/13/2026 10:39 EST)

$0.04 / count
Total: $21.10
Prime: ✅
Buy on Amazon
Columbian #10 Security Envelopes, 500 Pack, Self Seal Envelopes for Home, School, and Business Mailings, No Window, 4-1/8 x 9-1/2 Inches, Durable 24 lb White Paper

Columbian #10 Security Envelopes, 500 Pack, Self Seal Envelopes for Home, School, and Business Mailings, No Window, 4-1/8 x 9-1/2 Inches, Durable 24 lb White Paper

(as of 07/13/2026 10:39 EST)

$0.04 / count
Total: $21.57
Prime: ✅
Buy on Amazon
Columbian #9 Security Envelopes, 500 Pack, Double Window Self Seal Envelopes for Invoices and Business Mailings, Tamper Evident, 3-7/8" x 8-7/8", Durable 24 lb White Paper

Columbian #9 Security Envelopes, 500 Pack, Double Window Self Seal Envelopes for Invoices and Business Mailings, Tamper Evident, 3-7/8" x 8-7/8", Durable 24 lb White Paper

(as of 07/13/2026 10:39 EST)

$0.04 / count
Total: $22.01
Prime: ✅
Buy on Amazon
Quality Park #8 Double Window Envelopes, Self Seal Security Envelopes for QuickBooks Checks, 3 5/8" x 8 11/16", 24 lb White, 500 per Box (QUA50766)

Quality Park #8 Double Window Envelopes, Self Seal Security Envelopes for QuickBooks Checks, 3 5/8" x 8 11/16", 24 lb White, 500 per Box (QUA50766)

(as of 07/13/2026 10:39 EST)

$0.05 / count
Total: $22.74
Prime: ✅
Buy on Amazon
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