OEM Quality Park Redi-Seal 2 Window Envelopes are designed for efficient mailing with a convenient Redi-Seal closure that does not require moisture to seal. These double-window, No. 8-5/8 envelopes feature a unique double-flap design that prevents the gum from sticking before use. The top window measures 7/8 x 3-1/2 inches and is positioned 5/8 inches from the left and 2-1/4 inches from the bottom, while the bottom window measures 1 x 4 inches and is positioned 5/8 inches from the left and 5/8 inches from the bottom. Made from 24 lb. white wove paper, these envelopes include poly windows and an inside tint for added security.