One can wear a short or 3/4 rekel(jacket) and be considered Chassidish. If you are not familiar of real Chassidic clothing for men take a tour of such as G&G or G&B clothing for men who are Chassidic in levush and behavior. Unfortunately there is a new group who consider themselves Chassidic but they are modern Chassidic and we will not get into that Ervev 9 days. Many women who consider themselves Chassidic are not examples to follow because they want to be trendy and dance on two weddings. These women do not look Chassidic nor Litvish but modern who follow the styles dictated by the lowest of Paris. Unfortunately, some so called frum companies adapt to the styles but in my opinion it is as the store that was selling pig meat with a hechsher!! For a woman Tznius is most important as learning Torah for a man.
We grew up in a real Chassidic home with our father Z”L who wore a rekel and hat even around the house. Anyway, one of us married a real Litvish boy and he is ehrlich, frum and the family Rav. My sister follows all his minhagim and it was never an issue. When someone once commented to her that she can wear so and so because she is Litvish she answered that’s modern!
Yes, in the beginning it was hard but B”H she adjusted and even davens Ashkenaz. When someone commented that all sons in law were different, she commented “one takes The Bochur not a Bochur”.