I'd be interested to hear of any others with exceptionally tall sons. My son started his puberty growth spurt at 10, his voice had broken by 11 and a half, and he now stands at almost 6ft (he is 12 and a half now). Can I expect him to be near the end of his upward growth? His dad was fully grown at 13. I do really feel for my son towering over his peers, but he appears unbothered, as does my GP.