Perfect Fit: Compatible with models in size 6-10 work with S. Models in size 7-11 work with S. Easy to Use: The elastic design makes it easy to put on and take off, fitting most sizes comfortably. Lightweight & Comfortable: Made from soft silicone, it provides a barely there fit for all-day comfort. Stylish Colors: Choose from a range of vibrant colors to match your mood or outfit. Active Protection: Protect your smart ring during yoga, sports, biking, and everyday activities. Dimensions: 5.51 x 3.98 x 0.55 inches.