This is a trick I stumbled on today, and it saves about $1 in postage for a 1 pound 2 ounce box shipping with the U.S. Post Office. I boxed up the item in a 9x6x3-inch box, and the postage would have been $6.97 if I sent it parcel select. At this weight Priority Mail is less expensive, so I thought I’d try fitting the box in the Priority Mail padded envelope and… it fit! Very snugly, but it fit. This will ship for $5.70 and faster too. Hope this helps you.