ionic-framework/e2e/button/sizes/main.html

<ion-toolbar>
  <ion-title>Button Sizes</ion-title>
</ion-toolbar>

<ion-content padding>

  <p>
    <a button href="#">a[button]</a>
    <button>button</button>
  </p>

  <p>
    <a button small href="#">a[button][small]</a>
    <button small>button[small]</button>
  </p>

  <p>
    <a button outline small href="#">a[button][outline][small]</a>
    <button outline small>button[outline][small]</button>
  </p>

  <p>
    <a button clear small href="#">a[button][clear][small]</a>
    <button clear small>button[clear][small]</button>
  </p>

  <p>
    <button large>[large]</button>
    <a button large href="#">
      <span style="font-size:48px">H</span>
      <span style="font-size:38px">E</span>
      <span style="font-size:32px">L</span>
      <span style="font-size:24px">L</span>
      O</a>
  </p>

  <p>
    <a button outline large href="#">a[button][outline][large]</a>
    <button outline large>button[outline][large]</button>
  </p>

  <p>
    <a button clear large href="#">a[clear][large]</a>
    <button clear large>button[clear][large]</button>
  </p>

</ion-content>