I think I'd probably stick with a Medium if I were you. There is a little room for error in this jersey and honestly, the medium is a bit big in the bust on me anyway. I typically go with smalls because I have a small chest and waist, so I'm not sure how that compares to you. There is plenty of room in the shoulder and upper arms (where I'm more a standard medium) so I think you'd probably find the large to be just too roomy.