Item Number 91551 Gum-Seal Double Window Envelope. Just wet and press to seal. Security-lined. Envelope Size: 8 7/8 x 3 7/8 Upper window 4 x 1 and 3/8 from left and 2 1/4 from bottom Lower window 4 x 1 and 3/8 from left and 1/2 from bottom. Quantity Discount built into pricing. Call Office for large quantity orders. Ships direct from the plant Additional Details ------------------------------ Product description: Item Number 91551 Gum-Seal Double Window Envelope. Just wet and press to seal. Security-lined. Envelope Size: 8 7/8 x 3 7/8 Upper window 4 x 1 and 3/8 from left and 2 1/4 from bottom Lower window 4 x 1 and 3/8 from left and 1/2 from bottom. Quantity Discount built into pricing. Call Office for large quantity orders.