I was thinking in terms of sending a sample that you guys have a full lineup of sizes and send them off for users to try on and adjust from there. Unless the jacket is made the same way, especially the shoulders, you can get pretty different results if you take measurements from the customer's existing jacket. The most successful online made to measures send you their trial fits to work from. However, this method may be more difficult and costly if they'd be going back and forth between India and US. Just my 2 cents.