1. From the use requirements, if it is used by underage children, it is more appropriate to choose a 4mm rope. Because the child is not strong enough, inertia will be more likely to shake the rope in his hand. For adults, generally speaking, 5mm rope is more suitable for dancing in double flight and other fancy, because it is heavier and can better exercise arm strength.

2. From the perspective of personal preference, if you like the feeling of light jumping, you can choose a 4mm rope. And if you are more inclined to exercise your arm strength, then a 5mm rope may be more in line with your needs.

In short, we should decide which Pei Lin skipping rope to choose according to our actual situation and preferences.