Read the remainder of the blog entry for my experience on wearing 2 pairs of hosiery, that were too short, and my suggestion for the best fit.
On Sunday and Monday, I wore 2 pairs of hosiery, while at home, for extra warmth. Together, they seemed to slide down.
I think that if I wore the shorter hosiery on the outside and the longer hosiery on the inside, then they would have stayed up better. After all, if you wear the shorter pair on the inside, then the longer pair cannot be pulled up its full length, and then they will both be short, or be pulled too tight. On the other hand, if you pull the longer pair all the way up, and then let the shorter pair hang on that, then you do not need to pull the shorter pair all the way up, and it will still have something to grip on to.
On the other hand, why bother wearing a pair that is too short? Sometimes people do not like parting with it. Sometimes it is too expensive. The list goes on and on.