If you are shipping a bag of marbles (not a baggie full of marbles) like a Vitro or Marble King or advetising polybag or especially a mesh bag, put the bag inside of a baggie or bubblewrap and then wrap/tape it tightly before putting into the final package (usually a box). You want to ensure that the marbles inside the bag cannot move at all (boxes get thrown, etc. by shipper). That way the polybag or the mesh bag does not get torn. Over the years, I have had a few valuable bags get torn because the shipper did not think about it. There was one mesh bag that the shipper carefully cut out some styrofoam to fit the dimensions of the bag lying flat in a box. He put styrofoam on all sides, etc. But, the marbles inside the bag could still move and I received a bunch of marbles outside of a torn up mesh bag....