Which technique involves using rods of various sizes to create different curl patterns?

The technique that involves using rods of various sizes to create different curl patterns is known as the Multi-Size Rod Wrap. This method allows for the flexibility to achieve diverse curl types within the same hairstyle by incorporating different sized rods. By using larger rods for looser curls and smaller rods for tighter curls, the stylist can create a unique and multidimensional look. This technique is particularly beneficial when aiming to enhance volume and texture, providing a more natural appearance that can be tailored to the client's preference. It's widely used in chemical texturizing processes such as perming, where the diversity in curl size can significantly affect the overall outcome of the style.