Largest final round you've experienced?

I'm curious what is the largest final round you have competed in? I'm talking as the round was labeled as final. I know its suppose to almost be somewhat random on the number and when the round takes place. I ask this as I have played a few with 10, but most had around 6-7 finalist. However, yesterday I got into a 15 player final on Hex-a-gone and somehow manged to get my first and only win. Whats the smallest final you've competed in? Mine was 5.