Details

three equal vertical bands of green (hoist side), white, and red; Mexico's coat of arms (an eagle with a snake in its beak perched on a cactus) is centered in the white band; green signifies hope, joy, and love; white represents peace and honesty; red stands for hardiness, bravery, strength, and valor; the coat of arms is derived from a legend that the wandering Aztec people were to settle at a location where they would see an eagle on a cactus eating a snake; the city they founded, Tenochtitlan, is now Mexico City

note: similar to the flag of Italy, which is shorter, uses lighter shades of green and red, and does not display anything in its white band