I'll drag it out from the cellar where it lies after being shredded in yet another pitchpole and measure it some time. It had a larger head than the standard Goodall most Caps came with. Upwind it was fine but downwind I struggled and the more I swam the more conservative I became and I think this compounded my problems. I stress the word 'MY' because the other Caps in the UK seemed to not have my problems and, given that I could sail the Nacra happily enough I came to the conclusion it was probably the sail.