.progress-sm class to change progress size to small:
.progress-lg class to change progress size to large:
.progress-bar, so if you change that value the outer .progress will automatically resize accordingly.
.progress-bar-striped to any .progress-bar to apply a stripe via CSS gradient over the progress bar’s background color.
.progress-bar-animated to .progress-bar to animate the stripes right to left via CSS3 animations.
