mj-social-class.mjml

<mjml>
  <mj-body>
    <mj-section>
      <mj-column>
        <mj-social css-class="testing">
          <mj-social-element name="tumblr" icon-height="30px">
						Tumblr
          </mj-social-element>
          <mj-social-element name="vimeo" icon-size="25px">
            Vimeo
          </mj-social-element>
          <mj-social-element  name="web" line-height="30px">
						Web
          </mj-social-element>
        </mj-social>
      </mj-column>
    </mj-section>
  </mj-body>
</mjml>