Ok so I am 14, male, 5'7 113 lbs. I think I am going through a growth spurt, since I've grown 3 inches this year so far, whereas I have grown like 3 inches in the last 2 years. How much do you grow per year during a growth spurt? I've read that you grow like 4 in. a year for 2 years? Is that true? If so, does that mean I will be 5'11-6'0 next year at this time when I am 15? How tall do you think I will be by the end of december? My dad is 6'0, his bros are 6'1, 6'2, and his dad is 6'2. Thanks