I’m trying to knit a hat for my husband pattern here…Men’s Hat the gauge says 19 sts and 25 rows=4" in stockinette. I created a swatch (actually I made two) to determine my gauge b/c I’m a very tight knitter. My question is when determining my gauge do I measure my swatch’s width to see if it is 4"? And are there 19 sts within that 4"? Also, if I divide 19sts by 4" will that determine how many sts per inch I need? Any and all help would be appreciated!