The Sensor is 5mm in height and 35mm in diameter. The portion of the Sensor that gets inserted under the skin is less than 0.4 mm wide and it's inserted only about 5mm under the skin. In a study conducted by Abbott Diabetes Care, most patients don't feel pain when applying the FreeStyle Libre or FreeStyle Libre 2 Sensor*.

*Data on file. In a study conducted by Abbott, 93.4% of patients surveyed (n=30) did not feel discomfort under the skin while wearing the Sensor.