Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding._x000D_2. This product does not contain sensors. specification: Item Type: Patch for Sensor_x000D_Material: TPU_x000D_Size: Approx. 10 x 8.4cm / 3.9 x 3.3in_x000D_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, mild 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. 4Reinforcement Strip: Adopts high quality TPU material, safe and eco friendly, skin friendly and wear resistant. Reinforcement strip for fixing the sensor (not included). 510pcs Sensor Patch: 10pcs of sensor cover are available for use, meet your replacement needs, light weight and in small size, suitable for different occasion. PackageList: 10 x Patch