In which situations do you reach for a larger paddle?

I’ve also noticed the lack of blades in this size range. Seems like there might be a market niche for it.

Here are most of the paddles I use. I have 2 good Euro type paddles and several Aleut and Greenland style paddles. All of these were overlaid on a piece of paper and traced to give comparative sizes.
I find I do better in calmer waters with the Euros and the higher the waves get, the better I like the Aleut and Greenland types. The euros also do best for me in shallow water because of the length of the blades on the GL and Alaskan types.
OLYMPUS DIGITAL CAMERA by Steve Zihn, on Flickr
To clarify, the red Euro tracing is of the Warner Kalliste and the blue tracing is of the Aqua Bound Eagle Ray. I don’t think there is more then 1 Sq inch of difference between the 2.

Shallow rocky rivers.