OMG! I just spent the past day trying to get the correct gauge for my sisters sweater. Uggh! The pattern called for Size 8, 18 stitches=4 inches in garter stitch, worsted weight. I'm a loose knitter; so, I went down a size. That didn't work. Went back to 8...Nope, and so on until I ended up on size 10 needles. The yarn is Cascade 220 Heathers. It's not like this is chunky yarn. Is garter stitch tighter than stockinette?
Anyway, I will now bravely push forward and pray that this damn thing will fit my sister.