That's my exact board....5'9"x20"x2.5" Chemistry Beaker - 5 fin. One of my favorite small wave boards of all time, definitely one of the most versatile. From Knee high to well overhead and holds a line inside the barrel, which most small wave boards struggle with, for me anyway. Most of the volume is in the middle to nose of the board, provides plenty of paddle power but the tail tapers and I'm guessing that's why it can be surfed like a true shortboard in juicier waves. This is definitely the board I would have preferred at Uppers that day, the board is playful yet responsive.
http://img.surfride.com/prod/11/06/BKR-211190-4_T-m.jpg