Measure the foretriangle and main luff/foot/leech. Any online sail site will have instructions for doing this. Once you have the correct dimensions, look at all the used sail sites (Bacons/Minneys/Atlantic Sail Traders/Sail Wharehouse, etc.) and plug in your dimensions (not boat type). If you buy used sails, make sure you can return them if they don't fit or you don't like them. Most sail brokers will allow this if you return the sail in the same condition in a few weeks. Or order new sails using your dimensions. Good luck with your new boat.