Progress components are built with two HTML elements, some CSS to set the width, and a few attributes.

Use background utility classes to change the appearance of individual progress bars.

Add labels to your progress bars by placing text within the .progress-bar.

Use predefined modifier classes .progress-{sm|lg} to change progress element height.

Set a height value on the .progress-bar, so if you change that value the outer .progress will automatically resize accordingly.

Include multiple progress bars in a progress component if you need.