nine equal horizontal stripes of white (top and bottom) alternating with blue; a white square in the upper hoist-side corner with a yellow sun bearing a human face (delineated in black) known as the Sun of May with 16 rays that alternate between triangular and wavy; the stripes represent the nine original departments of Uruguay; the sun symbol evokes the legend of the sun breaking through the …
: https://www.cia.gov/library/publications/the-world-factbook/geos/uy.html