The Cartier Ballon Bleu is one of the brand’s most recognizable luxury watches, defined by its rounded case, sapphire cabochon crown, and elegant Roman numerals that curve with the dial. Introduced in 2007, the Ballon Bleu quickly became a modern classic for both men and women, offering a balance of refined design and everyday versatility. Available in stainless steel, gold, and two-tone models, as well as diamond-set variations, the Cartier Ballon Bleu is powered by precise Swiss movements that deliver reliability with style. As one of the most popular Cartier watches for sale, the Ballon Bleu continues to be a favorite among collectors and luxury buyers who value timeless sophistication.