#11 (4-1/2" X 10-3/8") Brown Kraft Commercial Style Envelopes - 25 Envelopes Per Pack Convenient 25 envelopes per pack. Ideal quantity for smaller scale users. These envelopes are brown/gold in color. The paper density that withstands extra wear and tear  far better than a standard white envelope. Fantastic envelope for greater security. Next to impossible to see through and features a gummed closure with commercial flap. Commercial flaps are rectangular with tapered sides, rounded corners, and a shallow, rounded point. This provides a greater sealing area for more security and protection. If you are concerned about your documents arriving safe and sound and need a larger than standard envelope, these are the envelopes for you! These are also great envelopes to store documents in or organize craft supplies. If you need a larger envelope with these same great features, check out our other sizes!