Security Window Envelopes | Business Envelopes with Inside Tint


Order Security Window Envelopes and get FREE shipping! Choose from single or double window envelopes with an inside tint. Perfect for mailing checks, invoices or documents containing sensitive information. These envelopes feature a Poly-film window which displays a pre-printed mailing address through the envelope and a printed security-tint pattern on the inside. Contents are hidden from view, even when held up to the light, which is ideal for business communication when privacy is important.

Choose from a variety of sizes including business-sized and large. Business security window envelopes are perfect for folded documents or checks, while large security window envelopes fit multiple sheets of paper. The transparent poly-film window is generally located in the lower left hand corner of the envelope. Order blank envelopes or personalize by including company logos, return address or other artwork in the upper left corner. Security window envelopes make business mailing convenient and hassle free.


Check Envelopes


Large Security Envelopes


Security Envelopes

Looking for non-window Security Envelopes? Choose from our wide selection of security-tinted envelopes, which help protect mail containing sensitive information. Ideal for mailing checks, invoices and a variety of other important business communication. Your recipients will appreciate security envelopes protecting their private information. Shop for Security Envelopes.


Check Envelopes

Need an envelope that fits most business checks? Choose from our selection of Check envelopes and find a product perfect for your mailing needs. Shop for regular and window envelopes for checks, in many sizes, with or 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 popular security envelopes are #9 and #10. The #10 is considered a standard envelope, and is the ideal size for letters, statements, and most other business communication.

Security Envelopes

  • #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.

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