I fiddled with the numbers of stitches until I finally came up with the correct cast on and a stretchy rib/seed stitch. He has a very high instep and I wanted to be sure he could get the socks on easily as I know he’d never wear them otherwise. I’m so happy they came out well and they FIT him!
Now, we’ll see if he ever wears them. His usual sock of choice is the nylon men’s dress socks.