Standart:
<div class="button button-default">Default</div>
<div class="button button-primary">Primary</div>
<div class="button button-success">Success</div>
<div class="button button-warning">Warning</div>
<div class="button button-light">Light</div>
Round:
<div class="button button--round button-default">Default</div>
<div class="button button--round button-primary">Primary</div>
...
Plain:
<div class="button button--plain button-default">Default</div>
<div class="button button--plain button-primary">Primary</div>
...
Disabled:
<div class="button button-default button--disable" disabled>Default</div>
<div class="button button-primary button--disable" disabled>Primary</div>
...
Big:
<div class="button button--big button-default">Default</div>
<div class="button button--big button-primary">Primary</div>
...
Large:
<div class="button button--large button-default">Default</div>
<div class="button button--large button-primary">Primary</div>
....