This an initial review.
These, short of leather straps and scraps of cloth, are the original sort of made-for-the-purpose garter to hold up the long socks worn for warmth below a kilt; made before elastic was invented.
These fellows shipped instantly by US mail from New England, so will arrive far in advance of the predicted time! Bravo!
How to tie them in two videos, the first for thin calves, the follow on video for thicker calves: https://youtube.com/watch?v=9h08uYRMx7A
(Comments on size and quality to follow, once received.)