Bootstrap buttons

<a class="btn" href="#">Read More</a>
<a class="btn btn-primary" href="#">Read More</a>
<a class="btn btn-success" href="#">Read More</a>
<a class="btn btn-info" href="#">Read More</a>
<a class="btn btn-warning" href="#">Read More</a>
<a class="btn btn-danger" href="#">Read More</a>
<a class="btn btn-link" href="#">Read More</a>

XSmall

<button class="btn btn-default btn-xs" type="button">XSmall</button>

Small

<button class="btn btn-default btn-sm" type="button">Small</button>

Large

<button class="btn btn-default btn-lg" type="button">Large</button>