How thick is the best sports mat for indoor use?

Indoor sports tend to have thicker fitness mats.

Suitable for flat support/abdominal training ... fitness mat with thickness of 10mm- 15mm for ground fitness exercise, with no pain in elbows, back knees and ankles.

4mm-8mm thick yoga mat is suitable for yoga/pilates, which is elastic, comfortable and stable.

7mm-8mm medium-thick high-density pvc fitness mat can be used for skipping rope and jumping, with high-density rebound, and it is not easy to sprain ankle, slip and drop slag.