That's the thing Joe, when the sheet netting came in, it was basically all 4" full mesh by 15 mesh deep, usually in 150 yards stretched, the manufacturers at the time used this mesh size due to the stretch in nylon,, plus the knot type the machine could throw but that was years back, these days depending on yarn,, knot type, and place of manufacture we can go up slightly in mesh size regarding stretched mesh size,, these days the nylon nets are set not only by heat but also taking into account how they are stretched, be it length ways or depth ways before being set to ensure uniformed mesh th