I learned knit to fit from Lifestyle Toe Up Socks - No Swatch Needed. I decided that for myself I prefer a gusseted heel. Straight Up Socks looks to be knit to fit with a Fleegle heel which is gusseted but I came across the pattern after learning to do my socks and don’t really use a pattern anymore so I’ve just looked at it. For a faux heel flap I learned from Toe-Up Heel-Flap Socks for Magic Loop and could try to explain how to apply the heel techniques to any number of stitches. I promise that I do it but not that I can explain it clearly.
How I make my “Vanilla Socks” lost me when it said to measure. Sorry, but my brain rebels at anything requiring measuring and figuring and gauge. That might work well for you though. I couldn’t find the My Plain Jane Vanilla Socks pattern.
I cast on for the toe and increase to fit the foot it’s for (works with any weight yarn because I don’t care about numbers) and at some point decide am I doing a gusset and start increasing at the appropriate length from the toe. I got my measurements (OK I measure some things!) from Liat’s Toe Up Heel Flap Socks and the measurements work for either the faux heel flap pattern or a Fleegle heel. For my daughter I do a short row heel and that’s trickier for me because I don’t do them as often and she’s at least as picky as I am about the fit. Do the heel and then knit the leg. So my “pattern” is: Cast on and work the toe, work the foot, do the heel, knit the leg. Always 2@time magic loop to avoid Second Sock Syndrome.
One of the best kept secrets in knitting seems to be that socks can be easy. If you can cast on, knit a tube, and turn a heel you can knit a sock. Learn knit to fit and all your socks can fit. My first pair fit and the pair I’m working on now will fit the person they’re for. Any frogging and redoing concerning fit will be because she gets to decide how snug she wants them.
I have cardboard templates of the feet I knit for and mark on them where to start heels, gussets, anything I’ll need to know next time.
My current Sox WIP awaiting a fitting.