I researched this very question when I was building my first aeroponic tubs and read that I should use a 1-7/8" hole saw so the pots would fit snugly into the holes. This was wrong. The holes were too small and would require too much hand trimming. I ended up buying a 2" hole saw later down the road, and the 2" net pots fit perfectly. Go with the 'lipped' net pots and a 2" hole saw.