If you are thin, you can also try to wear a casual short suit, which will look more elegant. The colors of small suits can be navy blue and big red, both of which are popular colors this year.
Actually, I don't think it's necessary to have a high collar inside. Just wear a small vest with a bottom, and a light one is OK.
This will look elegant, after all, a woman's neck is also beautiful.
One thing upstairs is right. You'd better wear a belt when you wear a jacket.
Ha ha.
I quit.
For reference only.