If you are looking for a sports bra or camisole to flatter a smaller chest, I highly recommend checking out
handful.com. At the beginning of the year I purchased one of their original bras (non-adjustable straps) in black and liked it so much that I purchased a second bra in white. Then I decided to give their camisoles a try and ended up buying two, one in black and one in purple. I haven't worn the camis to exericse in, but I have worn them as a casual top paired with a cardigan sweater and have actually received a couple of compliments on what pretty shirts they are.
I've been very pleased with the quality of all four items I've purchased. I've been wearing them regularly - at least weekly - for several months and they've held their shape and there is no pilling or other problems. They aren't necessarily inexpensive, but for me they've been worth the cost. There is no separate charge for shipping. I've received each one of my orders quickly, within just a few days of placing them.
I do not work for the company and have no relationship with them other than being a satisfied customer. I'm only posting this because I know every once in a while somebody posts asking for a good sports bra recommendation and I really think this is a nice product and right now the prices are reduced because they are clearing out old inventory (I just ordered the cami in gray)!