I mailed a bunch of them stuffed on monday and no problem. I also shipped parcels that were less that the 10.75 and 15.00 but it is so much now. So shipping is costing more. I was shocked too. Even parcel is only a few cents less than priority. Go figure. I am glad I have a tiny post office that will work with me to figure out the new rules. Hope none of them come back. I hate changes. Honestly.