A one length haircut where all the hair comes to a single hanging level is also known as a:

A one length haircut where all the hair comes to a single hanging level is referred to as a blunt cut. This technique involves cutting the hair evenly at one length across the perimeter, which creates a strong, straight edge without any layering or graduation. The result is a clean, polished look that emphasizes the weight and density of the hair.

This type of haircut is versatile and suitable for various hair types and lengths, making it a classic choice for many clients. The blunt cut also frames the face beautifully and can enhance the overall appearance by providing a sense of symmetry. It's commonly used in styles that seek to convey a modern, sleek aesthetic.

In contrast, the other options represent different cutting techniques. A layer cut would involve varying lengths throughout the hair to create volume and movement. A graduated cut features shorter layers at the nape and gradually increases in length toward the front, providing shape and dimension. A shingled cut is characterized by strands of hair that overlap, often used for styling short hair. Each of these techniques contributes differently to the hair’s shape and style, distinguishing them from the blunt cut's defining quality of uniformity.