Ubuntu 13.10 ships by default Nautilus, handy file manager utilizing by default its icon view, essentially, rendering files, folders, etc, as a grid of icons.
The icons feature a
100% default size, size properly aligning text documents, folders, images, music tracks inside the file-management app; yet, Nautilus supports the adjustment of its icon sizes, feature permitting a hassle-free change of the size used by the icons.
For example, changing Nautilus' icon size from the default
100% to the value
200% is as simple as: