They hold an average of 4 oz I believe. They are the ones Adagio uses for their smallest size above sampler (which is quite large.) I may post up a photo later tonight in the listing, so people who haven't ordered Adagio can see what the tins look like. They are tin body, plastic lid with pressure "latch" and gasket. Kind of like old-timey canning jars. They are reasonably airtight(ish)

Any takers? I'll leave this here for a week or so.