Spool knit sizes?

https://www.paracordplanet.com/double-sided-knitting-spool-multiple-sizes/

Hey guys. I just had some questions about these if anyone has info. How do the sizes work? Like do you need larger ones for larger cord? Or do the larger ones make looser knits?

Like for 550would a smaller size just make a tighter knit or would I need a large one to even do 550? I know there’s adjustments on how many pins you use as well