Save addressing time! Envelopes come printed with your return address plus a handy window so you don't need to write destination addresses by hand. The security tint keeps the contents confidential. Simply enter company name and address information in the window shown below.

 
9 x 4 1/8 #10 envelope. The top window measures 7/8 x 3 1/2 and is located 3/8 from the left and 1 inch from the top. The bottom window measures 3/8 from the left and 1/2 from the bottom.