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Window Envelopes

Window envelopes streamline business mailings by eliminating the need for handwritten or printed labels. Designed for invoices, checks, and other important documents, these envelopes offer a polished and professional look while ensuring accuracy in delivery. At Advanced Filing Concepts, we offer a full selection of single window envelopes and double window envelopes in bulk boxes of 500—perfect for high-volume business use. Our envelopes come in standard #9 and #10 sizes, as well as many other sizes, designed to fit most standard business documents. Choose from self-seal, security-tinted, and custom-printed options to match your needs.

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Option Best For Notes
#10 (4-1/8" × 9-1/2") Outgoing invoices & statements Standard business size
#9 (3-7/8" × 8-7/8") Reply/return envelopes Fits inside #10
Single Window Recipient address only Simplest, most common
Double Window Recipient + return address No manual return printing
Security Tint Privacy for sensitive data Great for statements
Digi-Clear® Window Laser printer workflows Resists heat/clouding
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