3″ x 2.5″
Standard square corner window position & window size
6.5″ x 9.5″
Solid color flaps, bleeds, tight registration, etc.: Industry standard is 1/16” variance/movement when converting envelopes from flat sheets.
Size: 9″x12″ Style: Single right-hand pocket with business card slits
Two box pockets with business card slits on left-hand pocket
Standard USPS sizes for Postcards and Letter Envelopes
Standard USPS requirements