A saree blouse should fit just enough that you are able to tuck one finger under the blouse. A blouse that’s too tight around your chest can make you feel suffocated, so it should be loose enough to give you enough room to breathe in. But ensure there isn’t too much gap between your body and the hemline, as that can throw the entire look off. A loose-fitting blouse will look awkward and give the outfit a sloppy feel, so the blouse should be stitched to fit your body measurements exactly plus a tiny bit extra for breathing room.