I just received this shirt in the Plum color today. I love it, and I'd love to buy additional colors. I haven't worn it for running yet, but I put it on right away to try it on, and didn't take it off the rest of the day. Such a cute shirt to wear running, or just out and about! I wear either a S or M in tops (5'7, 121 lbs., 34A), and I'm glad I purchased this top in a Medium. The length on this is nice (I would have liked it even a bit longer) and the fit is a bit loose, which makes it comfortable, but not sloppy-looking. I think the Small would have been a bit too short and snug. The only reason I gave this product 4 stars instead of 5 is because the "Run" letters on the shirt are in a dark pink instead of black as shown in the picture. Therefore, the word tends to blend into the background color. I would have preferred the black lettering, but that's okay -- still love the shirt!
Colorado Springs, CO