Hi tj,
We started from an original length of about 11" overhead (to tip of handle) and then later cut two inches off it, which was fine for a while. We changed paddling technique about 5 months ago and found the paddles a bit long.
I got radical and hacked about 6 inches off the shaft recently and may have gone a tad radical


. It's perfect for racing and forces you into a strong posture for sprint racing. At the same time I went down to a 90 sq in blade and am now thinking I will cut my 100 sq in down to 4" above head height just to see how we go. I'll most likely cut it the remaining inch to be around 3" above head as well, as I mostly race and surf and don't do a lot of social paddling, so a short shaft will be perfect .... and the fact that I can't remain paddling slow to save my life [}:)] regardless of shaft length.
It's all about weighing up your needs vs desires and then making an intelligent choice BEFORE you take to the shaft with the hacksaw.
DM