Haru is probably a bit better than average for most things, so height 178 CM or so,

Academic is a little better than average since he's more the creative type (i.e photographer and dabbling in drawing) 

He's probably average or maybe a little worse than average in regards to athleticism. Again, very artsy rather than sporty, but he has enough energy to play with his little sisters without getting tired so *Shrugs*

Any other info, feel free to ask! I didn't think to add that so I'll edit it now