Handy little coin envelopes are ideal for small parts, samples, seeds, enclosures, loose coins and payroll applications. Flaps feature deep gumming for a secure seal. No. 5-1/2 coin envelopes are made of sturdy, 28 lb. Kraft stock. #5-1/2 (3.12″ x 5.5″) – 28lb – Gummed – Kraft – 500 / Box – Brown Kraft