bootstrap text sizing

1<p class="fs-1">.fs-1 text</p>
2<p class="fs-2">.fs-2 text</p>
3<p class="fs-3">.fs-3 text</p>
4<p class="fs-4">.fs-4 text</p>
5<p class="fs-5">.fs-5 text</p>
6<p class="fs-6">.fs-6 text</p>

1<p class="lead">
2  Vivamus sagittis lacus vel augue laoreet rutrum faucibus dolor auctor. Duis mollis, est non commodo luctus.
3</p>