I'm trying to add a class to a single div (or multiple, depending on what the search results return) however the code I have below is adding the class to all of the .price.full divs on the page, rather than just applying to the one(s) that matches the :has. 
jQuery(document).ready(function() {
    jQuery('.price.full p.price:has(small)').closest('.price.full').addClass('price-enquiry');
});
The HTML
    <div class="price-rating">
    <span class="price full price-enquiry">
        <div itemprop="offers" itemscope="" itemtype="http://schema.org/Offer">
            <p class="price"><small>+44 (0) 1395<br> 444099</small></p>
            <meta itemprop="price" content="0">
            <meta itemprop="priceCurrency" content="GBP">
            <link itemprop="availability" href="http://schema.org/InStock">
        </div>
    </span>
    <div class="product-codes">
        <span class="oe-code">
            OE Code: 82-5323/4          
        </span><!-- .oe-code -->
        <span class="sku">
            SKU: MG41           
        </span>
    </div><!-- .product-codes -->
</div>
`.
– Fabian Klötzl Mar 17 '17 at 13:13