Sometimes I follow them:
Targeted 4", extra stitches at sides, knots in the cast-on tail to record needle size, wet blocked aggressively. Still too small? Project goes up a needle size.
Sometimes I don't:
What size needle? One strand? Alternating? Two strands - marl the marled? What about a 1x1 rib? Nope, squares. How big a square?
Lots of decisions. It's almost tougher to replace a list project made from stash with another dive into the stash. But I will not buy yarn for this one. And it should be quick knit, since a do-over has boredom knit into it before we start.
Worst swatch ever, but it was all the sampling I needed! And this one will be ripped out. I think I need the yardage.