Bootstrap badge scale to suit the size of the parent element by using relative font sizing and em units.

Badges can be used as part of links or buttons to provide a counter.

Remark that depending on how you use them, badges may be complicated for users of screen readers and related assistive technologies.

Unless the context is clear, consider including additional context with a visually hidden piece of additional text.

Add any of the below-mentioned color props to modify the presentation of a badge.

Apply the shape="rounded-pill" prop to make badges rounded.

Use position prop to modify a component and position it in the corner of a link or button.

You can also create more generic indicators without a counter using a few more utilities.