15 year old male average height/weight?

Yes, 5'9 is the average height for a male here in UK. From the ONS (Office of National Statistics) The ONS said the average man in England was 5ft 9in (175.3cm) tall and weighed 13.16 stone (83.6kg). The average woman in England weighed 11 stone (70.2kg) and was 5ft 3in tall (161.6cm).

More via this BBC News link. http://www.bbc.co.uk/news/uk-11534042 The tallest people on Earth are the Dutch. Https://www.bing.com/search?q=dutch+tall...