Coin Envelopes - 2-1/4" x 3-1/2" Handy little coin envelopes are ideal for small parts, samples, seeds, enclosures, loose coins medium-sized envelope Brown Kraft. Ideal for distributing student lunch tickets, coins, petty change, and other tiny, easy-to-lose items. Seal with gummed flap. 2-1/4" x 3-1/2", 500 envelopes/box.