What is the most standard face shape?

Melon face: As the name implies, it looks like melon seeds, with a sharp chin and a smooth face. The cheekbones should not be too high, and the lines from the top of the head to the chin should be smooth. There are no edges and corners. Oval face: the face is slightly longer and the chin is not so sharp. Smooth, but being sick doesn't mean having no chin. Much like an oval face. Similarly, the cheekbones should not be too high. The top of the head may be too sharp.