“12 inches of virgin and wavy hair”

I’m 18 years old, virgin hair, non-smoker, I’m 160 centimeters tall and I weigh 49 kilograms. I study medicine, I go to the gym for 2 hours every day at 5 in the morning and I take care of my diet. I don’t smoke or drink alcohol.
My hair is virgin, I wash it every day, I use different products and creams to take care of it, I don’t usually use the iron or the dryer much, maximum once a month.
I don’t have many photos of it but it is very thick and resistant. Any questions I can answer.