In perming, a one-base size is equal to what measurement?

In perming, the concept of a one-base size is essential for understanding how to achieve consistent and uniform curls. This measurement is defined as being equal to the diameter of the perm rod. When setting the hair, using a one-base size means that each section of hair being wrapped around the rod should match the rod's diameter to create a consistent curl pattern.

By ensuring that the section size corresponds exactly with the diameter of the rod, the stylist can maintain uniformity in the curls and achieve the desired texture and volume throughout the hair. This is particularly important for achieving the intended results in permanent waving and can affect the overall aesthetic outcome of the perm. Understanding this measurement aids in the preparation and application of the perm and helps in predicting the final appearance of the hairstyle.