JSFiddle - React, Tailwind, and code Playground

HTML

<aside>
  <h1>Product Name</h1>
  <div class="sku">
    <h3>
      100 – Small
    </h3>
    <div class="dimension">
      <ul>
        <li>
          <span class="title">
            Product Dimensions
          </span>
          <span class="specs">
            23.75w
            x
            17.75h
            x
            28d
          </span>
        </li>
      </ul>
    </div>
  </div>
  <div class="sku">
    <h3>
      200 – Large
    </h3>
    <div class="dimension">
      <ul>
        <li>
          <span class="title">
            Product Dimensions
          </span>
          <span class="specs">
            29.75w
            x
            17.75h
            x
            28d
          </span>
        </li>
      </ul>
    </div>
  </div>
</aside>

CSS

.sku:first-child {
    display:none !important;
}