Double Envelope, founded in 1917, is a manufacturer and distributor of custom envelopes to residential and commercial customers throughout the southeastern United States. It specializes in the manufacturing of commercial, custom-printed and specialty envelopes, mailers, catalog covers, photo bags and print wallets. Its clients include direct mail, packaging, photo finishing, financial services and mailing companies. The company produces more than 2 billion envelopes annually, and is owned and operated by BSC Ventures. Its Web site offers details of sizes and styles, information on addressing and printing guidelines and price quotes. Double Envelope operates manufacturing facilities in Roanoke, Va., and Gainesville, Fla.