What is a good vertical leap for a 14 year old?

Question

mine is 20 inchs but im not sure if that is good or not

Answer 1

It's really hard to say what it should be.  I think that 20 inches is a good start.  Just keeping jumping, be sure to use your arms to help you get up in the air on your spike approach, that will only help your vertical!  Good luck, repetition, repetition, repetition!  :-)