Styling font in image captions in content

I built some image galleries (not an actual gallery, just a collection of images) to serve as category pages on my website, and captioned them. I have tried, so far unsuccessfully, to style the font to a larger font size.

It looks like this is a .wp-caption-dd element. I'm not sure what I need to do to style it, and where it needs to be placed in the style sheet.

Here is a page on the site (work-in-progress):http://nelthropp-low.com/wp/online-store

This is the bit of code:

<dl class="wp-caption alignnone" id="attachment_130" style="width: 310px;">
<dt class="wp-caption-dt"><a href="http://nelthropp-low.com/wp/store/products/category/island-bracelets-2"><img class="size-medium wp-image-130" alt="Island Bracelets" src="http://nelthropp-low.com/wp/wp-content/uploads/2013/10/bracelets_home-300x187.jpg" width="300" height="187"></a></dt>
<dd class="wp-caption-dd">Island Bracelets</dd>
</dl><dt class="wp-caption-dt"><a href="http://nelthropp-low.com/wp/store/products/category/island-bracelets-2"><img class="size-medium wp-image-130" alt="Island Bracelets" src="http://nelthropp-low.com/wp/wp-content/uploads/2013/10/bracelets_home-300x187.jpg" width="300" height="187"></a></dt><dd class="wp-caption-dd">Island Bracelets</dd><dl class="wp-caption alignnone" id="attachment_130" style="width: 310px;">
<dt class="wp-caption-dt"><a href="http://nelthropp-low.com/wp/store/products/category/island-bracelets-2"><img class="size-medium wp-image-130" alt="Island Bracelets" src="http://nelthropp-low.com/wp/wp-content/uploads/2013/10/bracelets_home-300x187.jpg" width="300" height="187"></a></dt>
<dd class="wp-caption-dd">Island Bracelets</dd>
</dl>

Thank you!