Twitter "Follow" Button.

large-button-followers.html

<a href="https://twitter.com/bgardner" class="twitter-follow-button" data-show-count="true" data-size="large">Follow @bgardner</a>
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script>

large-button-no-followers.html

<a href="https://twitter.com/bgardner" class="twitter-follow-button" data-show-count="false" data-size="large">Follow @bgardner</a>
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script>

medium-button-followers.html

<a href="https://twitter.com/bgardner" class="twitter-follow-button" data-show-count="true" data-size="medium">Follow @bgardner</a>
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script>

medium-button-no-followers.html

<a href="https://twitter.com/bgardner" class="twitter-follow-button" data-show-count="false" data-size="medium">Follow @bgardner</a>
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script>