Because we try to use USPS Flat Rate Bubble Envelopes, we are able to ship some things which actually way more than 1 pound in that kind of envelope. There are some items that won't fit in one of those envelopes, so we have to charge for whatever packaging the item does fit in. Hurry to do your shopping before the US Postal Service raises the price of flat rate packaging again. It seems like rates go up almost monthly.