Well, wouldn't you know, the boatload of similarly sized envelopes I have were a shade too big and USPS declared them to be a "large envelope" and thus bumped up the rates. So, I found these. They fit within the rate structure of a "letter" so I save on postage. Assuming you don't go over 1 ounce, these can be mailed using an ordinary 1st class postage stamp which is 48-cents (on a meter) and 49-cents for a stamp (I think that's right). Anyway, these are less expensive to mail thSee full review