The B500's sensor measures 1/2.3 inches. Which is approximately 6.16 x 4.62 mm. This is much smaller than the sensor in a basic APS-C cropped-sensor DSLR like the D3500 (23.5 x 15.6 mm) or a full-frame sensor DSLR like the D850 (35.9 x 23.9 mm).