Puzzled.
What are men doing here in the CR discussing women’s adornments??
Tznius is one of those tough subjects that requires a solid Mesorah and a very good dose of common sense. It’s not easily quantifiable, like how many tefachim in an amah or how much romaine lettuce in a kezayis or exactly how far and you’re out of the tchum.
Especially in our difficult dor, when any semblance of modesty has been completely discarded by the secular community, we women need to be very careful that our natural sense of style and innate wish to look pretty, is not being influenced from outside our own daled ammos.
There are of course guidelines that fall within the boundaries of Halacha. Past that, the best advice is to find a woman to look up to and to consult with. It can be a parent, teacher, Rebbetzin, friend or neighbour. Choose wisely.
And may I ask the gentlemen here to kindly stick to their own areas of expertise. Like shul coffee and Tefillin. There is an inyan of Tznius for men as well. And your own mentors would probably agree that your minds are better occupied by matters other than nail polish colours.