Which guideline is typically used to create layers or a graduated haircut?

The traveling guideline is utilized for creating layers or graduated haircuts because it involves cutting the hair progressively, which allows for a seamless and natural transition in length. When using a traveling guideline, the stylist takes a small section of hair and cuts it to the desired length, which then serves as a reference for the next section. This technique encourages movement and dimension in the haircut, crucial for layering.

In contrast, a stationary guideline remains fixed in one place and is often used in blunt cuts where hair is cut to a single length. Curved guidelines are less common but can be helpful for adding rounded shapes to a style. Vertical guidelines typically assist in maintaining even lengths in straight cuts rather than progressing into layers. Therefore, the traveling guideline is the most effective choice for achieving the desired layered effect in hair styling.