Handy little coin envelopes are ideal for small parts, samples, seeds, enclosures, loose coins and payroll applications. Flaps feature deep gumming for a secure. Find Pack of (), /4" Long x /2" Wide Gummed Flap Kraft Coin Envelopes at MSC Industrial Supply, serving the metalworking, safety, and MRO. Quality Park coin envelopes are the perfect size for the small items you need to contain. Our coin and small parts envelopes hold keys, stamps, coins, seeds.