Is possible to get QStyle::SP_FileIcon larger?

Hi, I use a QListWidget that can show the items in both modes: list mode and icon mode. In list mode I show the icon QStyle::SP_FileIcon for each item. But in icon mode, I first show the SP_FileIcon and then, if the file is an image, I show it as icon. The problem is that the SP_FileIcon is shown very small. I would like to know if there's a way to get SP_FileIcon larger other than scaling it or the only solution is to use another icon "from my own". Thanks.

Those icons have size predefined. You can only scale them or don't use them at all.