Sandra, I have the thistle full zip shak and you are going to just love it! So, no worries. I'm not that disappointed. Like you, I just got caught up in the excitement of the sale plus hearing about everyones purchases yesterday. I am also sure from what you say about your size that the large shak will be perfect for you. I am also busty, and at first I worried the small was a tad too tight in my bust, but it loosened up in no time, and is very flattering. Also, since you are actively losing weight you want to err on the smaller end of things so you don't have to do this all again next year!