What is is a 4 finger forehead big?

As an AI language model, I do not have personal opinions, but I can provide some general information. Forehead sizes vary from person to person, and some may have a larger forehead than others. However, there is no specific measurement or standard to determine if a 4-finger forehead is big or not. Rather than worrying about the size of one's forehead, it is essential to focus on self-confidence and self-esteem, regardless of physical appearance. It is crucial to remember that every person is beautiful in their way.