ionic-framework/ionic/components/button/test/icons/main.html

<div class="padding">

  <div>
    <button class="button button-primary ion-home icon-left">
      Left Icon
    </button>
    <a class="button button-primary ion-home icon-left">
      Left Icon
    </a>
  </div>

  <div>
    <button class="button button-primary ion-star icon-right">
      Right Icon
    </button>
    <a class="button button-primary ion-star icon-right">
      Right Icon
    </a>
  </div>

  <div>
    <button class="button button-primary ion-ionic button-icon">
    </button>
    <a class="button button-primary ion-ionic button-icon">
    </a>
  </div>

  <div>
    <button class="button button-primary button-large ion-home icon-left">
      Left, Large
    </button>
    <a class="button button-primary button-large ion-home icon-left">
      Left, Large
    </a>
  </div>

  <div>
    <button class="button button-primary button-large ion-star icon-right">
      Right, Large
    </button>
    <a class="button button-primary button-large ion-star icon-right">
      Right, Large
    </a>
  </div>

  <div>
    <button class="button button-primary ion-ionic button-icon button-large">
    </button>
    <a class="button button-primary ion-ionic button-icon button-large">
    </a>
  </div>

  <div>
    <button class="button button-primary button-small ion-home icon-left">
      Left Icon, Small
    </button>
    <a class="button button-primary button-small ion-home icon-left">
      Left Icon, Small
    </a>
  </div>

  <div>
    <button class="button button-primary button-small ion-star icon-right">
      Right Icon, Small
    </button>
    <a class="button button-primary button-small ion-star icon-right">
      Right Icon, Small
    </a>
  </div>

  <div>
    <button class="button button-primary ion-ionic button-icon button-small">
    </button>
    <a class="button button-primary ion-ionic button-icon button-small">
    </a>
  </div>

</div>