I got sent home from work one day in 1969 because my skirt was just above the knee. Then again, I was working in the South when my ex was at Fort Benning. Guess I would have gotten fired if I had worn a micro mini!
IIRC, panty hose in many colors didn't become widely available in department stores until the 70s. Before then, you had to order ballerina tights from Danskin. And your mini had to be long enough to cover your "suspenders" -- the garter belt, much adored by Playboy magazine and other pervs. Bare legs were not a thing in daywear or the workplace until the late 90s or even later for the workplace. Queen Elizabeth did not allow bare legs at court; even Melania wore hose occasionally; tanning lotion and oil most times. On most people bare legs are a crime, as are halters, or leggings with a short top.
I worked in LA for that year so short skirts were de rigueur. Trousers were added in the cool of the computer room, then removed in the programming room. ‘Twas a wonderful year, with sports car racing on the mountain roads and music blaring at top volume.