Weird image whitespace

Question

All images get these white borders around them all over the page. Even in product view and category view. I havent found any CSS that would do that and would'nt belive it is some kind of plugin. Is anyone experienced that before?

Magento 1.9.3

To clarify: these white areas appear even when I insert image as big as the container

Answer 1

This is not css issue. When you resize the image the magento will automatically add the white background to fill the container size. use keepFrame(false)

$this->helper('catalog/image')->init($_product, 'small_image')->keepFrame(false)->resize($_imgSize);

here are example1 example2 how to remove white background