Product sizes shopify

product sizes shopify.liquid

{% comment %} will output sizes if they are first option{% comment %}

<ul class="product-sizes">
              {% for variant in product.variants %}
              {% if variant.available %}
              <li>{{ variant.option1 }}</li>
              {% else %}
              <li class="disable">{{ variant.option1 }}</li>
              {% endif %}
              {% endfor %}
</ul>