Looking for a #10 security single window self-seal imprinted envelope?this single window self-seal envelope is the perfect choice. It will save you lots of time since it has all your company information printed on the envelope and has a self seal flap that seals securely. Add your company logo at no additional cost ! Envelope size is 9 1/2 x 4 1/8 Window size 4 1/2 x 1 1/8 Window placement 7/8 from left - 2 1/2 from top. DF713