Regarding the thickness of yoga mats, the common yoga mats on the market have several thicknesses of 3.5 mm, 5 mm, 6 mm and 8 mm. The most basic suggestion is that beginners can use thicker yoga mats, such as 6 mm thick, to prevent sports injuries. After having a certain foundation and experience, you can switch to a yoga mat with a thickness of 3.5 mm to 5 mm. Of course, if you are very afraid of "pain", you can always choose a relatively thick yoga mat for practice.