Thickness
Yoga mat thickness is largely a matter of personal preference. Thin mats (around 3 mm) are lightweight, easy to carry and provide better stability for balance. Thicker mats offer more cushioning and support, which can be helpful if you have sensitive knees, wrists or joints.
Thicker mats can also be comfortable for Pilates or other floor exercises.
Thin mats provide greater stability and connection to the ground, while thicker mats offer more padding and comfort.