alum mast dimension for 59sq ft sail

I've picked up an old Oday Widgeon that needs a sail and mast. I've decided to put a Bolger
59sq ft sprit boomed traingular sail on it from a Polysail kit.

any idea's what diamater and thickness round aluminum tubing to use?

I'm not in the mood to make a wood mast , so I'll just buy the tubing. even with the absurd
prices of metals right now.