Compatibility: The Alpine Loop Compatible with Apple watch perfectly fits for Apple Watch Ultra 49mm, Apple watch SE and Apple watch series 8 7 6 5 4 3 2 1, UBIUO ike+,sport &Edition all models of 42mm 44mm 45mmSize: There are two size. L size fit WRIST size 7.1"-9.99"(180mm-252mm), M Size fit WRIST size 6.10"-8.66"(155mm-220mm). The L Size specially designed for the big wrist. Please check your wrist size before choosing the suitable sizeMETAL Connector: The Connector made of METAL material as the G-hook. UBIUO o plastic. Make your watch durable and secure. And the band made of premium quality nylon materials by knitting craftsmanship to make sure a soft and comfortable feeling. Perfect in many occasions, daily wear and sports, especially for indoor and outdoor activities such as travel, running, cycling, exercising, parties, etcEasy to Install: The stylish and adorable designed bands for Apple watch has a great hook to make your bands flexible and secureWarm tip: Please feel free to COUBIUO TRACT US SELlER directly on your order page and click "Contact Seller" if you have any quality issue, you will get a quick reply and we will work with you until you are completely satisfy