Quality Park. The 1-3/16″ x 3-1/2″ top window is positioned 3/8″ from the left and 2″ from the bottom. The 1″ x 4″ bottom window is positioned 3/8″ from the left and 1/2″ from the bottom. REVEAL-N-SEAL SELF SEAL CLOSURE: The best overall self-sealing envelope in the industry!