Quality Park ecoEnvelope Reusable Two Way Double Window Envelope, #9, 3 7/8 x 8 7/8, 1000/Bx

Double window envelopes offer a single reusable, two-way method instead of using two envelopes. Simply tear along the perforation to open, insert your response, and then seal just like a normal envelope to reuse. When you send the envelope back, Envelopes are compatible with most standard, 8-1/2" x 11" envelope size. Top window (1" x 3-1/2") is positioned 1/2" from left and 2-1/2" from bottom of the envelope.

Quality Park Double Window Envelope QUA24530B: The bottom window (1-1/8" x 4") is 1/2" from the left and 3/4" from the bottom. Inside tint provides privacy of contents. Adhesive is heat-resistant with using paper material, 24 lb. Envelopes are packaged in a fully reusable bulk carton that transforms into a letter-size file box when empty.