I am trying to embark on my first ever sweater. I have never done a swatch, but I understand if the garment is going to git when I'm done, I've got to start work in the correct gauge. How the heck does one figure this out? The pattern says, using size 7 needles, 18 stitches and 29 rows = 4" st st. I get that. I've done 4" st st with size 7 needles. The 18 stitches = 4" across, but the 29 rows ends up being more like 5". I've tried 5s, 8s, and 9s. I'm never getting a 4x4 square. Suggestions?
PS I know I'm the resident smart-alleck, but can someone suggest a solution other than, "try a different hobby."