#10 Business Envelope – 9 ½” W x 4 1/8” H. Made for 8 ½” x 11” paper. Solid face, commercial flap and gum seal. Free inside printing or security tint. Works well with laser and ink jet printers. On this Basic Paper Your business and personal mailings will stand out, smooth, vibrant, matte, 80lb text-weight paper. Contains 50% recycled content (10% post-consumer and 40% pre-consumer waste).