This 9 x 12 booklet standard window is the industry standard. As with all booklet style envelopes, the flap/opening is on the larger side. The window is in the vertical position to show a mailing address in the normal position on an 8 1/2 x 11 letter size sheet. Save money on labels by having the address show through the window on this sturdy, well constructed envelopes.

See below for specs.

Size - 9 x 12
Construction - side seam booklet
Paper - 28# white wove
Window - 4 1/2 x 1 3/4 (Note: Also available with 4 1/8 x 1 3/4 size window)
Window Position - 2 1/2" Left and 7/8" Bottom (vertical)

PLEASE NOTE: If you are sending artwork for this job. Please click on the "Send a File" button to the left and you can attach the file there. Please reference your order and input all information on the upload window.