modesty.

There is no problem with riding on stage and not wearing pants. There is a problem with immodest clothing. In the Gemara, riding a horse appears as a recommendation and not as a prohibition, but when today's norms do not consider it immodest, then there is no problem. They did not practice stricter rules, although the Shach and the Chazo wrote that it was appropriate to do so. There are methods that prohibit wigs entirely, and therefore the question is only relevant to methods that permit them. Of these, there are jurists who have written that a wig that resembles hair is a problem. The question is whether head covering is a formal or substantive matter. Since in my opinion today there is no immodesty in this, only the formal matter remains, and therefore there is room for leniency. And the stricter one will receive a blessing. I didn't understand the question about the length of the wig. But there are no rules in halacha regarding what a wig should be.