There are about 12 collar types for men’s dress shirts.
Dress shirt collars should be considered an extension of a man’s face. It should be treated as a shirt feature that could help improve the facial features.
Long pointed collars like this 2-button Italian style collar can help create an illusion of length and could suit a man with a rounded face.
Conversely, short collars like this cut away styled collar creates an illusion of width and might very well suit a man with a narrow or rather long face.
Men with oval-shaped, regularly-sized faces may choose any type of collar they want.