Staples #6 Kraft Coin Envelopes with Gummed Flaps - 3-3/8" x 6" - Brown - 250 PackKeep small items organized and secure with Staples #6 Kraft Coin Envelopes. #6 coin envelopes are great for storing money, receipts, coins, keys and more, and they are also an ideal size for greeting cards, invitations and all types of announcements. These envelopes feature a square flap on the short side to keep items from falling out and a gummed closure that is moisture activated for a secure seal. The kraft envelopes are made of sturdy 28 lb stock