I thought I'd share these. They are nearly the exact size of a tin (flat and rounded square sides); each holds 8 oz (but probably 4-5 oz of tobacco). The cost was $7.80 for 4 Ball jars. They have a standard wide mouth lid with seal. My idea was to transfer a tin of tobacco into a jar to keep it air tight - I'm slow at using up a tin once I open it (i.e. the tobacco dries out before I get around to finishing it).