Protect your sensitive information with a security check envelope. #9 envelopes are perfectly sized to fit inside the #10 to use as a return envelope. Save time by printing the mailing and return addresses right on your document to show through the poly film windows. Perfect for mailing checks, bank statements, and standard documents. #10 envelopes are the standard business-size envelope. Print the mailing and return addresses right on your document to show through the poly film windows.
Perfect for mailing paychecks, bank statements, and documents. Save even more time with a simple seal window envelope. Print your name, address, and logo right on the envelope! Get creative with easy-edit templates or let our expert designers draw you a proof. #10 Window Envelope, the standard size for businesses, will save your company time to focus on the important things. No need to address every letter, simply print the information on your documents to show through the poly film windows. Shop for window envelopes and get free shipping! Perfect for mailing checks, invoices, business documents, and more! Window Envelopes come in multiple sizes including: #6 3/4, #7, #9, and #10.