I love this jacket, but there is really nothing that oversized about it as in the description...actually it says "item runs very oversized". I ordered a small because I am typically a medium. It fit, but it was definitely tighter in the arms than I like.....now, I do lift weights, but I wouldn't say my biceps bulge out of my sleeves. :) I ordered the medium and liked the fit just fine. Kept both, but because I do like the look of both. So...I would order your normal size on this one....while the bust may be a smidge larger, the arms on this one are definitely not matched up with the "over-sizing". Just to compare.....I also ordered the Dolly jacket and that one (while again not THAT oversized) is more in line with oversized in the sleeve and bust evenly. However, again - I ordered a small and medium and still didn't find the medium "very oversized" as described in the Dolly either.
Rated 0 on a scale of minus 2 to 2, where minus 2 is Loose Fit, 0 is Perfect and 2 is Runs Large