Office Depot #9 Security Envelopes, Double Window, 37/8" x 87/8", Clean SealThe Office Depot #9 Security Envelopes with a double window are designed for secure and convenient mailing. Made in the United States, these envelopes have a clean seal to protect your documents. With a size of 3 7 8" x 8 7 8" and a quantity of 250 units, these sturdy envelopes are ideal for businesses and individual use to ensure your mail is safe and secure. R8C39