EGP IRS Approved 1099 Tax Form Envelope Works with 1099 2up forms Bottom Window: 3 3/8x 1 7/16 - 1/2 from left, 1 1/2 from bottom Envelope: 5 3/4 x 8 7/8 - 25 envelopes per unit Top Window: 1 1/8 x 3 3/8 - 1/2 from left, 3 3/4 from bottom See below for product details