First, the good kind: it depends on everyone's preferences and the material and style of the sweater. Depending on the mode,
From the fineness point of view: 12 needle is better.
Judging from fineness: 12 worsted fabric for needles, relatively
Second, which is the thickest: 7-needle woven fabric is thicker and suitable for winter wear.
A sweater knitted with 9 stitches/12 stitches is suitable for spring and autumn days.