I was bummed they didn't have any in the store because I really wanted to try on first before buying. I know from past experience that these body hugging tops from Old Navy run on the smaller side. Even though I wear a size medium perfect Tshirt which fits very loosely and comfortably, I sized up to... a large with this velvet ruched top, and I'm glad I did. It's not tight, but still body hugging with just the right amount of stretch. I also ordered in "tall", even though I'm 5'5" 155 lbs, and the length is just right, not cropped! I'm not big busted either, just a B cup, and it fits perfectly. The armhole, on me, fits perfectly, no gaps or pulling in the large, and since I sized up, no back bumps from my strapless bra, looks nice and smooth! It it were tighter, it would show every bump, even with the ruching. Overall, great fitting dressy velvet top, looks great with jeans and heels or boots for casual holiday get-togethers. #sweepstakes