For personal use only....
I needed these measurements the other day. They were in my logbook. My logbook, of course, was not with me.
The Internet nearly always is these days. So I'm going to post them up here against the next eventuality.
By the by, the reason I needed them is that I want to procure a whisker pole for running downwind. Apparently, the required length is 'J'. Of course, the ideal length would depend on the cut of your jib.
The clew of ours is cut high, so I'm thinking we could get away with a little less than J.
3 meters, perhaps?