Ever designed an envelope. If yes, you know the head it is. If no, you are about to find out. If you are designing an envelope there are a ton of things that come into play: OCR read area, postage, barcode area and more. And depending on your printer you might be limited with your bleed preference. I am convinced that the USPS tries to make it as hard as possible to design one of these, and their website is no help. So, I looked around and found an alternative website that gave all the specs in an easy to read/understand webpage. Omegaonline.com shares with us.