Hey Antho, from memory the spec'd weight that was on the box net was 5.1kg for the Meduim (7'0" x 31' @116ltrs).
Hey RRK, Naish have definitely delivered something different to what is already on the market. And it is pretty exciting to ride. I have to admit, it has taken me some sessions to really work it out, but now I think it is becoming my favourite beach break board. It catches waves so easily, it's amazing for it's size. And when I say say easy, I mean like a 10' board, really impressive.
Here is a little vid I popped together in some really ugly conditions, 10+kts dead onshore and mushy closeout knee high slop. I was more playing with a new GoPro mount (which didn't really work yet! Mark II will be on it's way soon) and stuffed around with some fast frame changing editing (which also didn't really work, but is watchable). Always good to play around and experiment

This doesn;t really showcase the boards potential, but in some ways it does. If you saw the waves from the beach, you most likely wouldn't have gone out.
Ride safe,
JB