in need of advice

I have been dinighy sailing now for a few years and have got into catamarans. instead of buying a VERY EXPENSIVE cat I decided to design my own cat to save me money. I have read many arcticals on catamaran profarmce and I have designed the hull of my cat. I went to london boat show this year and found a rig manufacture. I have been e-mailing him for about a mounth now concerning my design. the manufacture has now e-mailed me saying he wants some sketches of my design to give me a quote on the mast, cross-beams, boom ect. I e-mailed him back saying what specific measuremnts of my cat do you want and he just said to send me what i've got. can anyone tell me what specific measurements would I need to give him? my cat that I've designed is 4.9m long and 2.25m wide. I want to have a main sail area of approximatly 10-11 sq metres. I've draw a side view drawing of the hull and rig. but i am having problems with drawing a sail. I have looked at the other proformance cats on the market and have tried to draw a similuar outline of the mainsail. would this be good enough for the rig manufacture?

thanks for the help!!