I have found after much experimentation, that the shorter I go, the faster I go.
I started out at 220cm and have slowly gotten shorter and shorter.
I'm 6'3" with long limbs.
What I have found is that tall people actually need shorter paddles, otherwise the extra length of your stroke because you are tall, gears you too high to make full power.
I rev way faster now and my speed has gone up as well as my heart rate, showing that I am using extra oxygen and therefore making more power.
I am currently experimenting at a way short 205cm.
I will probably settle out around 207cm, but given time, the body adjusts to any length and it feels natural after a little while, so may very well stay where I am now.
I don't really think I could go shorter as it is becoming hard to reach the water sometimes in the ocean.
Even at that stupidly short length, I still stroke slower for the same speed than the paddlers around me.
My own extra size and work on a better stroke allows for a long stroke, even though he paddle may at first sound short.
The bonus is that the paddle is far less effected by winds.
So as far as I am concerned, all the silly little ways of predicting paddle length are just that, silly.
They all predict a longer paddle for a taller person.
If a tall person has a high vertical type stroke with good rotation, then I rekon 210cm is a good place to start.
If you are shorter, then probably around what Lat suggests.
If you get a hold of a 205-215cm adjustable paddle, you won't go wrong.
A shorter paddle also gets out of the water sooner and that stops you from paddling too far back and merely pushing water upward, which is bloody inefficient.
It also makes you think about your entry more and rotating, reaching and getting a good clean catch.
If you think about it, the length of the paddle when it is beside you, doesn't make a difference, because the paddle is vertical and moving away from the boat.
Only at the beginning of the stroke and the end of the stroke does it change things.
Getting the paddle out quickly and cleanly without trying to submerge your boat by paddling with your blade pointing at the bottom is a good thing and allows you to get it back around for where the real action happens in the forward part of the stroke.
Having a longer paddle also takes longer for the catch to happen and builds power slowly.
If you look at the power profiles of the best paddlers, there is a very high, very narrow peak.
Have a read of the article on this site for an explanation of why tandem paddlers must be in sync.
The same applies to a single paddler, it is not about the area under the curve, but more about the peak power produced.
Having a long paddle works against this.
All the time spent entering and exiting a long paddle is better spent on another stroke.
Another bonus is that as the distance apart you prefer to hold your hands doesn't really change with paddle length, your hand is closer to the water with a short paddle and gives a more open and powerful arm position; Much like having a high seat.
I'm not a guru, but I am curious and willing to experiment and go against tradition and folklore to find what really works.
I take on board anything I hear around the traps, but I base my recommendations on hard numbers.
I have spent a good year working on busting the many myths
of paddles and the really whacky ways of finding a size.
I have solid data for many lengths and sizes, and what has become apparent to me, is that as long as you can reach the water, the paddle is not too short.
The speeds reached in a surf ski are just not high enough for most people to reach their cadence limits.
Funnily enough, with a short paddle, because of the cleaner entry /exit, I find that I can paddle down a wave at far higher speeds than I can with a long paddle.
If you hit say 25kph on a wave and try to start paddling, the awkward entry of a long paddle may very well throw you out of the boat, whereas it is easy to start paddling at these speeds with a short paddle.
It is also much easier to get away from a full stop as well as providing better acceleration at any speed.
I predict a future of shorter paddles and faster times for anybody that has a GPS, an analytical mind, and the balls to step outside of the established circles, and give really short paddles a go.
Follow the path of the independent thinker. Expose your ideas to the dangers of controversy. Speak your mind and fear less the label of 'crackpot' than the stigma of conformity. And on issues that are important to you, stand up and be counted at any cost.--- Thomas J. Watson