No where on the site does it mention that extra postage is required for the size photo/envelope that we purchased. It was a 5 x 5 square card. I sent out all of our cards, only to have them returned. They required an additional.39 that had to be manually addressed individually. It was an extra $40 in postage, and 1.5 hours of my time at the post office. No response from photo affections from my emails.