The zig zag pattern is my own.
I knitted them on 2mm Knit Pro (Picks) circular needles, simultaneously.
I used the Andersson Toe Up Method with Mach II Heel (revised).
The cast off is new to me. It was sent as a link to the sock lists by Diane (thank you kindly) and is called Jeny's Surprisingly Stretchy Bind Off. It is too! Not only stretchy but easy to execute. I doubt I shall return to the Elizabeth Zimmerman Sewn Cast Off now.