Just an FYI for future swaps, the priority envelopes purchased on line are a forever price, so whatever the rate is when you buy them, they will work even later when the price goes up. Also, they come with a tracking number. No waiting in line either to buy them or send them. I also included one in the package, so 15 f8ths, 15 slide lock baggies, and a pre-stamped return envelope all. Fit in a priority envelope. Good to know! 8-)