Free Country Flag Icon Set

Liquidicity, a blog on design and technology, is sharing a huge set of flag icons with over 240 unique items. The flags come in multiple sizes (16×16, 24×24, 32×32, 48×48, and 64×64) with 2 variants: flat and standard shiny one.

The icons are in .PNG format and organized by country name + ISO-3166-1 alpha-2 country code where available.

I have been looking for a quality flag set for a while and this by far seems like the best set I have found!