Because it is cold feet at desk work, I made it long. It will fall off as it is, but it is okay if you are wearing tights. Although there is not much durability, if there are 4 pairs, it seems to have one season.
When I bought four pairs and wear it on a daily basis, my hair ball begins to fall off in about a month, and it is thin enough to lose a few feet in two months. It's warm and tight, but I think it's okay to have some more durability. My job is delivery by motorcycle.