Blackmagic URSA Cine 12K LF Body has a Full frame sensor with dimensions of 35.64mm x 23.32mm and sensor area of 831.00mm2.
Blackmagic URSA 12K LF's sensor is 64% larger than the average Mirrorless sensor in its class. In cases where all the other parameters are the same between two cameras, the one with the larger sensor collects more light per pixel and performs better (less noise) in low light / High ISO conditions . Larger sensors also give the photographer more control on the depth of field.
Read our detailed Blackmagic URSA 12K LF Review