There are many different ways that people can wear their hair. One popular style is called an arch. For a girl, this means that her hair is styled in a way so that it forms an arch shape. This can be done with different types of hairstyles, but it is often seen with updos or ponytails. The arch style is a versatile look that can be dressed up or down, depending on the occasion. It's also a great way to show off your facial features and neckline.