Didn't know what size to get but careful reading of instructions and what I make I determined this was the best size for me.  Couldn't decide between a 4qt and a 6 qt.  I wanted a 6 qt but Amazon forced you to buy Amazon Prime if you wanted the 6 qt and I didn't want that FORCED on me as I don't want Prime Membership right now and didn't want the hassle to quit later.