DIY: How to turn tights into thigh high stockings. I might stitch the stockings to a sturdier stretchy band at the top, so they hold up to the garter clips better. Maybe those wider stretchy headbands?
The tights the lady wore were plain black and I cannot remember her shoes. But coming across this picture, these tights and shoes would be perfect, and the tights would keep the outfit from being too black.
Stockings worn to the knee became popular in the before this women were expected to wear full length wool stockings. They also needed shorter stockings in order to dance! These "Suspended Style Thigh Highs" would have fit the bill.