Hoi An, Vietnam. We spent 9 days in Hoi An because we enjoyed it so much. Much of Hoi An industry comes from food and tailor made clothing. Tourism and hotel industry is rapidly growing in Hoi An as well.
After spending 3 days walking around and looking at tailor shops here in Hoi An, I can safely say that the 4 tailors/clothing shops we bought clothes from are all places you could go and be very happy with the end result for your tailored clothes.