Security Envelopes | Business Envelopes with Inside Tint


Order Security Envelopes and get FREE shipping! Perfect for sending checks, invoices, statements or other sensitive information. Make sure your private information stays private with security envelopes. Choose from a variety of popular envelope sizes, including #6 3/4, #8 5/8, #9, #10. Each envelope features a security tint pattern printed on the inside of the envelope. This pattern darkens paper stock and hides text so the contents of the envelope remain hidden from view. Ideal for sending private personal or business information such as financial documents, medical records, checks, bank and tax statements, or legal documents.

Select from Regular or Security Window envelope options. For added protection, check out our FDIC security tint options.  Business envelopes with an inside security tint feature a standard gum or self-seal. Choose the Printed option for further customization. Save time when mailing, and include company name, return address, logo, or other information of your business or organization. Also ideal for creating return envelopes, making it quick and easy for recipients to send back payments or other sensitive information.


Security Envelopes


Security Business Envelopes


Large Security Envelopes


Security Window Envelopes

Choose from our selection of Security Window envelopes. Ideal for sending sensitive financial or business communications. Choose from a variety of sizes and styles to suit your needs and offer your recipients a glimpse into your envelope contents. Available in a wide range of sizes, including #6 3/4, #7 3/4, #8 5/8, #9, #10, 6x9 and 9x12. Shop Security Window envelopes.


Check Envelopes

Need to send a personal or business check? Choose from our selection of Check envelopes to provide you with an efficient way to mail payments. These envelopes come in a variety of sizes, colors, and styles - both with and without an inside security tint. Available in many popular sizes including #6 3/4, #7 3/4, #8 5/8, #9, and #10 envelopes. Shop for 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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