iframe-widget.html

<style>
/* RESET CSS */
  html, body, div, span, h1, h2, h3, h4, h5, h6, p, a, em, img, strong, sub, 
  sup, b, u, i, center, ol, ul, li, label, aside, footer, header, section {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
  }
  aside, footer, header, section {
    display: block;
  }
  body {
    line-height: 1;
  }   
  ol, ul {
    list-style: none;
  }
    
/* Widget Styling */
  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    font-size: 100%;
    color: rgba(0, 0, 0, 0.9);
    padding: 0;
    margin: 0;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: subpixel-antialiased;
  } 
  p {
    font-size: 16px;
    text-align: center;
    margin-bottom: 5px;
    color: #444;
  }
  .widget-container {
   padding-left: 4px; 
   margin-top: 24px;
  }
  .trust-badges{
   max-height:75px;
   display: block;
   margin-left: auto;
   margin-right: auto;
  }
</style>

<!-- Sets the widget height -->
<script>
  Widget.setHeight(150);
</script>

<div class="widget-container">
  <p><strong>Trusted by thousands!</strong></p>
<!-- Replace the url with your images url -->
<img src="https://cdn.shopify.com/s/files/1/0024/0726/8387/files/trust_badges.png?v=1576177724" class="trust-badges">
</div>