Jam Paper brown kraft #11 commercial business envelopes are made out of smooth, high quality, 28lb paper. This pack contains a total of 50 envelopes. Each one of these envelopes measures 4 1/2 x 10 3/8 inches in size. Featuring a basic and versatile brown kraft color, these envelopes are ideal of a wide variety of personal and business mailing purposes! Their size makes them perfect for three-times-folded standard sized sheets of paper. Use them to send documents and letters from your home or office with ease! Each one features a commercial flap opening and a reliable gum closure to keep the items placed inside secure as they make their way through the mail. Size: 4 1/2 in x 10 3/8 in. | Color: brown kraft | quantity: 50/pack