Security Envelopes | Business Envelopes with Inside Tint


Order Security Envelopes and get FREE shipping! Protect your recipient's privacy with envelopes featuring an inside security tint. Great for mailing checks, invoices, tax information, medical reports or any other sensitive information. Available in a variety of sizes including #6 3/4, 3 5/8 x 8 5/8, #9, #10, 6x9, 9x12 and 10x13. Display pre-printed information through a Security Window Envelope, available in double or single window styles.

We can print addresses, logos or any text onto select security window envelopes. See a PDF proof before printing. Pick from products with a standard gum seal or a Peel and Seal adhesive strip. We also offer FDIC security tinted products. The pattern darkens paper stock so the contents of the envelope remain hidden from view. Use these products to mail private information that cannot be compromised.


Security Envelopes


Security Business Envelopes


Large Security Envelopes


Security Window Envelopes

Looking for secure window envelopes? Display pre-printed text through a transparent Poly-film window while protecting the rest of your mail from being read through a sealed envelope. Your recipients will appreciate security envelopes protecting their private information. Shop Security Window Envelopes.


Check Envelopes

Need to mail a check or invoice? Order check envelopes with a window to display pre-printed mailing or return addresses. Great for mailing important financial information. These envelopes come in a variety of sizes, colors, and styles - both with and without an inside security tint. Shop Check Envelopes.


Not finding what you need? Have a question about a printed order? We would love to see if we can make your order - and life - a little bit easier.


Security Envelopes Size Guide

Not sure what size you need? Our size guide can help you pick the right envelope, for the right reason.

The most common size security envelopes is the #10. This is a standard envelope size, and the most popular for sending documents, invoices, statements, or other materials. If you are mailing a check, you may want to choose 8 5/8 or #9. If you're unsure which size you need, simply measure the item and choose an envelope that is at least 1/16" to 1/8" larger than the insert.

Security Envelope Sizes

  • #6 3/4 (3 5/8 x 6 1/2) - Fits a personal check, plus a small insert - up to 3 1/2 x 6 1/4.
  • #8 5/8 (3 5/8 x 8 5/8) - Ideal for many printed commercial and business checks.
  • #9 (3 7/8 x 8 7/8) - Return envelope. Fits comfortably inside a standard #10 envelope.
  • #10 (4 1/8 x 9 1/2) - Standard business envelope. Fits an 8 1/2 x 11 piece of paper folded in thirds.
  • 6x9 Security Envelope - Fits up to a 5.85 x 8.85 insert. Typically used for small catalogs, brochures, or folded paper.
  • 9x12 Security Envelope -Fits up to a 8.75 x 11.75 insert. Typically used for standard catalogs, or several sheets of paper.
  • 10x13 Security Envelope -Fits up to a 9.75 x 12.75 insert. Commonly used for larger catalogs, or with a 9x12 envelope.

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