@literally45-- That's a good question. I'm not really sure but I have a friend who has a wedge haircut and she has a long oval face. It looks good on her.
By the way, I think short, wedge haircuts look best on women over forty. We're in that age group, and I think it suits us well. When a twenty-year-old has a wedge haircut, I feel like it makes her look a lot older than she is.