What does it mean that i have a 50cm Femur a 182 wing span at 173cm tall at 15,1 and im I'm 128 on my knees?

[DIGGY]

What does it mean that i have a 50cm Femur a 182 wing span at 173 at 15,1 and im I'm 128 on my knees? im 15,1 years old dad 177 and mom 164