Template
Download the 1:1 PDF with the die line from the calculator. The red line is the cut, the yellow one is the crease. We don't print these lines.
Bleed and margin
Extend the background 2 mm beyond the cut line. Keep important content 3 mm away from the cut and the creases.
Flaps and circle
Once folded, the top and bottom flaps sit on the back of the envelope, turned 180° relative to the front. When closed, the lock circle shows the inside print. A logo or initials on the circle therefore need double-sided printing: place them on page 2, where the circle is.
File format
Send a CMYK PDF with fonts embedded or converted to outlines and images at 300 dpi. Page 1 is the outside of the envelope, page 2 the inside.