The 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