Boardsportsource recently produced and interesting article (click in the photo to read it in full):
The article written by Robert Etienne through a series of interviews from industry insiders from Bic, Fanatic, Starboard, Red Paddle, SIC and others predicts a bright future of the sport, with growing numbers for the next 5-8 years, and defining it as the fastest growing watersport on the planet.
Defining the actual volume of the sport is hard, as most companies do not make their numbers public, but a good guess would be around 70 million euros, in Europe, and only considering boards. If you add paddles, fins, leashes, and RSPRO rail savers ;-) the figure can easily go around 90 million euros.
Good article and good read.