JAM Paper Brown Kraft #10 Commercial Business Envelopes measure 4 1/8" x 9 1/2" each and are made out smooth, high quality, 28 lb. paper. With their basic and versatile brown Kraft color, these envelopes are perfect for a wide array of business and personal mailing needs! Their size makes them perfect for enclosing and sending three-time-folded documents and letters. Each one of these envelopes features a commercial-style flap and a reliable, moisture activated gum closure to keep the items placed within them secure as they travel through the mail. In this pack, there is a total of 100 envelopes.Details:Brown Kraft4.125" x 9.5"28 lb/75 gsmCommercial flapGum closure100 envelopesPaper