Mattress said...I'm just about to get my first SUP and don't know what size paddle to get. Anyone know of a rule, guide etc. I'm assuming its all about your height and nothing about the board. I'm 5'11".
Any advise from experienced riders would be great

I agree with Dave Kalama when he says your paddle should be between 8" and 12" over your head height.
My surf paddle is 8" over and my flat water paddle is 12" over.
There are a lot of other things to consider like board size, your body size.. and the conditions that you paddle.
You should also consider what size blade.. It seems like small blades are the go these days.
DJ