Mason jar size? › Board Rules & Regs › Welcome Newbie! › Mason jar size? This topic has 1 reply, 1 voice, and was last updated April 19, 2015 at 6:29 pm by . Viewing 0 reply threads Author Posts April 19, 2015 at 6:29 pm #355732 ellphilbin I’m thinking of making a batch of dried soup mixes that I have been reading on this site. One question. What size mason jar do I use for these mixes? Author Posts Viewing 0 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Register Log In › Board Rules & Regs › Welcome Newbie! › Mason jar size?