For a 1995 Catalina 320, the standard Size 7 asymmetrical spinnaker is
recommended, with a luff (I) dimension of 43.66 ft and a foot (J) of 12.33
ft. This sail typically has an area of approximately 742 sq ft (approx. 69
m²) and a 165% LP rating.
Different manufacturers make different sizes so you need to know your
dimensions as well as the range of wind speed that you will be sailing in.
The weight and type of sail material varies by wind conditions...