??????????

Depends what standard.. I'm playing youth club rugby at inside centre and I'm 6"1 and 83kg at 16 years old - I'm pretty strong for my team though, depends on what your role in the backs is? Martin got it right, you have your bastareuds on the one hand and your fofanas on the other. Youth teams I'd say 73+ packing at least less than 15-20% body fat. School rugby you can get away with a lot less (in my opinion) if you are a technical back (playing at 12 as a 2nd playmaker rather then being a hulk at 13). The 13 at my club weighs in at 95kg and 6"3 although he is a monster and does weights with the 1st team...

It depends on how much you weight and if you are an outside or inside centre. Outside centres are always bigger than the inside, for example, Mathieu Bastareaud and Wesley Fofana, or Manu Tuilagi and Anthony Allen in the Tigers. But when you are 16, the weight would be around 72 kg.