The Mead #10 Envelopes are letter size, measuring 4-1/8″ x 9-1/2″, and feature a security printed lining for privacy. These rectangular envelopes have a gummed closure for easy sealing. The white paper envelopes are coated for a professional finish and come in a pack of 40. Made in the United States, these envelopes are ideal for everyday use in businesses and industrial settings for secure and confidential shipping.