KlearKare Invisible Screen Shield Protector for Generic Watch 21mm Face Bezel | Military Grade Scratch Protection PROTECTOR SIZING: Measure the diameter of the glass face on your watch. Look at the product photos to get an idea. This will be the size you need to order. Do not go by manufacturer specifications. Order a size smaller than your measurement. If you measured 36.5mm you will need 36mm. If you are unsure, please email us with your watch model number. We will be happy to tell you the size needed. Our product will adhere properly to curved glass watch faces. Made in the USA Worldwide Top Selling watch face protector! Thousands of satisified customers. Klearkare uses the highest quality American-made material on the market. Custom cut to fit your device. Due to the nature of the film, KlearKare can achieve maximum screen coverage where other products fall short. Please note: A water solution is used in the installation. Watch our installation video to get a better understanding of the install. Ease of installation: KlearKare wet-install method ensures a super easy, bubble-free, and frustration free installation that will leave our film perfectly contoured to any device. Liquid solution allows adjustments during installation ensuring proper alignment the very first time. High definition clarity with smooth glass like texture. Self-healing nano technology helps film heal from scratches when exposed to heat. Self-healing nano technology helps film heal from scratches when exposed to heat. Our material is tough and helps absorb any impact while protecting your screen from scratches. KlearKare is scratch-proof, puncture proof, and UV resistant. Made in the USA - Satisfaction guaranteed , Lifetime Replacement program, thousands of satisfied customers, Includes Retail Packaging, Screen Protector , Micro-Fiber Cleaning Cloth