Ohhh for 100...yes, ask the post office, however, I think it's just 2 stamps (you can buy these in books, as one stamp....I used them for wedding invites)
Chad and Emily - 10/28/06
Abigail Suzanne - 1/6/09
Corbin David - 11/6/12
I just looked this up for my announcements....according to USPS.com, the max size for a letter 1 ounce and under (42 cent stamp) is 6 1/8 inches high, 11 1/2 inches long, and 1/4 inch thick.
As long as it's under an ounce (which, if it's a card or card and photo...anything "normal", it will be) a 5x7 envelope is just one stamp. Just like a 3.5x5 or any other rectangular envelope less than 12" long.
Re: does anyone know how much postage costs for a 5 1/4 X 7 1/4 envelope??
I just looked this up for my announcements....according to USPS.com, the max size for a letter 1 ounce and under (42 cent stamp) is 6 1/8 inches high, 11 1/2 inches long, and 1/4 inch thick.
I am just using regular stamps for my 5X7 cards.
HTH!