Do we know if row 39 reclines fully? and how much space is there next to J? Last time i flew the 787 we sat in row 30 and I had middle seat and couldnt even sit in my seat due to the narrowness of the seats.

I will be traveling with my wife and 1 1/2 year old daughter and would either pick 39H and J or 20 e and f

Advice?