Our 18"x24" unique Cinco de Mayo poster design of. Poster is perfect for Cinco de Mayo decoration, gift, solidarity, framing, home, office, etc. Size: 18"x24" (glossy poster paper). Delivery: Unframed. Comes in a mailing tube. Officially licensed image/elements. Cinco de Mayo ("Fifth of May") is an annual celebration held on May 5. The date is observed to commemorate the Mexican Army's victory over the French Empire at the Battle of Puebla, on May 5, 1862, under the leadership of General Ignacio Zaragoza.