This bag was made with circular netting. By tying an overhand knot to join the string from the bag and the string from the netting shuttle, it is easy to know when each round is finished. That makes it easy to know when to start the decreases for the bottom of the bag.
The grommet at the bottom of the bag is the last thing finished on this style of bag. This grommet will be one of the techniques taught in the next netting class I record.