Everyone is different when it comes to choosing the right mouse size. The size of your hand and your preferred mouse grip play a big role in finding the best gaming mouse for you, so look for a mouse that fits your grip to start.
If your hands are less than 17,5 cm (6,9 in) long, it’s generally recommended to go with a small mouse. Medium gaming mice are normally suitable for hands that are 17,5-19,0 cm (6,9 – 7,5 in) long. If your hands are over 19,0 cm (> 7,5 in) long, you should go with a large gaming mouse.