A capacitive sensing structure comprises a plurality of first sensors electrically coupled to each other in a first direction, each first sensor comprising: a first arm extending along the first direction, and a second arm extending along a second direction perpendicular to the first direction and bisecting the first arm to form open regions at least partially defined by the first and second arm; a plurality of second sensors electrically coupled to each other in the second direction, each second sensor comprising: a first arm extending along the second direction, and a second arm extending along the first direction and bisecting the first arm to form open regions at least partially defined by the first and second arm; and a plurality of single electrically conductive and electrically floating structures, each disposed within open regions of adjacent first and second sensors.