Alex and Ani bangles have been popping all over the place. Celebs such as Jessica Simpson, Vanessa Hudgens and Gwenth Paltrow have been spotted wearing them. I love their expandable bangles, like the one here, which you can adjust to the size of your wrist for a perfect fit. They come in all different price range. This "Tree of Life" single bangle goes for $21. You can check out all of their jewelry here.