The Apple Watch Series 11 (2025) features a thinner design in 42mm or 46mm sizes, powered by the S10 chip with 64GB storage and optional 5G connectivity. It includes an Always-On LTPO3 OLED display (up to 2000 nits), 50m water resistance with a 6m depth gauge, and advanced health monitoring, including new hypertension notifications and a 24-hour battery.