#9 envelopes are slightly smaller than a #10 envelope. They can still fit a folded letter size sheet of paper but it will be more snug than a #10. The window size and position is exactly the same as a #10.

Size: 3-7/8 x 8-7/8"
Construction: diagonal seam (side seam is available)
Stock: 24# white wove
Seal: regular gum
Window size: 1-1/8" x 4-1/2"
Window position: 7/8" from left and 1/2" from bottom

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.