Source google image: https://image.made-in-china.com/2f0j00GNsajgyKflzq/High-Quality-2-5cm-3cm-4cm-Martial-Arts-Tatami-Puzzle-Mat-for-Wholesales.jpg
Tatami puzzle 4cm
Source google image: https://image.made-in-china.com/2f0j00GNsajgyKflzq/High-Quality-2-5cm-3cm-4cm-Martial-Arts-Tatami-Puzzle-Mat-for-Wholesales.jpg