I started this Bell Sleeve Pullover on May 18th. I had about 4 false starts, first trying size Small (bust 36) which seemed almost ridiculous and indeed when I got to the underarms it was much too tight. So then I tried Medium (bust 39) which was closer but still too small. One of the biggest problems seemed to be that both those sizes only had 15 rows before the underarm join was made. Being a tall person I should have just realized that would make a big difference and head straight into the Large size (bust 43) even though a 43" bust seemed much too large. But I went for it, with a size US7 (4.5 mm) hook instead of the G hook (4 mm) I started with .