{$sizes=','|explode:$product->variant->size}
{foreach $sizes as $size}<div>{$size}</div>{/foreach}<div>XS</div>
<div>S</div>
<div>L</div>var windowHeight = $(window).height();
 
	$(document).on('scroll', function() {
		$('.block').each(function() {
			var self = $(this), height;
			var top = $(document).scrollTop();
			height = self.offset().top + windowHeight - 30;
			
			if (top + windowHeight > height) {
				$('.block').addClass("fixed");
			} else {
				$('.block').removeClass("fixed");
			}
			
		});
	});