To update font sizes, you can try adding `lg` for large text and `sm` for small text.

```jsx in Markdown
import {
  Header,
  Paragraph,
} from './';

<div>
  <Paragraph lg>
    This paragraph is large.
  </Paragraph>
  <Paragraph>
    This paragraph is normal.
  </Paragraph>
  <Paragraph sm>
    This paragraph is small.
  </Paragraph>
  <Header.h5 lg>
    This Header.h5 is large.
  </Header.h5>
  <Header.h5>
    This Header.h5 is normal.
  </Header.h5>
  <Header.h5 sm>
    This Header.h5 is small.
  </Header.h5>
  <Header.h5
    displayHeader
    lg
  >
    This Display Header.h5 is large.
  </Header.h5>
  <Header.h5
    displayHeader
  >
    This Display Header.h5 is normal.
  </Header.h5>
  <Header.h5
    displayHeader
    sm
  >
    This Display Header.h5 is small.
  </Header.h5>
</div>
```
