Note: Please allow slight error due to manual measurement. Thanks for your understanding. specification: Item Type: Patch for Sensor_x000D_Material: TPU_x000D_Size: Approx. 10 x 8.4cm / 3.9 x 3.3in, 5.1 x 3.9cm / 2 x 1.5in Features: 1Perfect For Daily Activities: Thin and flexible, it can support the body's natural range of motion. After attaching it, you can run, walk, swim and take a bath, and do your daily activities. 2Safe And Non Irritating: These patches are hypoallergenic and latex free, gentle and non irritating, has no harm to skin, you can use it with confidence. 3Easy To Use And Remove: Good stickiness, stick firmly, not easy to fall off. The easy to tear backing sticker makes sticking a breeze and easy to remove after use. 4Good TPU Material: Made of high quality TPU material, safe and eco friendly, non toxic and harmless, skin friendly and wear resistant, convenient for use. 510pcs Sensor Patch: 10pcs of sensor cover are available for use, meet your replacement needs, light weight and in small size, perfect for different occasion. PackageList: 10 x Patch