The height of your jump before flicking will depend on your individual preference and comfort level. However, as a general rule of thumb, you should jump high enough to generate enough force to pop the board off the ground and flick it into the air. You don't need to jump too high, as this can make it difficult to control the board.

Here are a few things to keep in mind when deciding how high to jump:

* The higher you jump, the more time you will have to flick the board. This can be helpful if you are still learning how to flick the board correctly.
* The higher you jump, the more height you will have to catch the board. This can be helpful if you are having trouble landing the kickflip.
* However, if you jump too high, you may find it difficult to control the board and land it smoothly.

Experiment with different jumping heights to see what works best for you. As you become more comfortable with the kickflip, you can gradually increase the height of your jump.
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