Kaisa Leka did some research into the prizes awarded Finnish comics artists in the last four decades. She writes:
I hate it when comics have to be explained, but here’s a translation and explanation I wrote on Facebook:
Translation: One hat in the drawing represents six “Puupäähattu” comics prizes awarded to a Finnish artist during the years 1972-2013. (Except the topmost male hat, which represents five prizes, making the total six awards to female artists and 35 to male.)
Explanation to non-Finnish readers: The prize is named after a famous classic comics character who wore a similar hat, and the person who gets the prize also receives a very nice felted hat in the same style.