Compatible Models: Designed for Apple Watch Ultra 2, Apple Watch Ultra 49mm, Apple Watch SE, and Apple Watch Series SE 9/8/7/6/5/4/3 (45mm/44mm/42mm & 38/40/41mm). Comfortable Size for Adventures: Fits wrist sizes 125-220mm (4.9-8.7 inches) with an adjustable metal loop for a comfortable and secure fit. Suitable for most men and women. Premium Material: Made from high-performance elastomer with a tubular geometry, this rugged Ocean Band is perfect for extreme weather conditions, mountaineering, and deep-sea diving. Secure Fit: The metal clasp and adjustable loop ensure the band stays secure during high-speed water sports. Its stylish design is ideal for various social settings, making it a great gift for friends and companions.