Both Nikon D5600 and Nikon D3200 have APS-C sized 24.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Another difference between these two cameras is that Nikon D5600's sensor lacks anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the D5600 and D3200 sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D5600 and Nikon D3200 Cameras
Nikon D5600 and Nikon D3200 have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.
DxOMark Sensor Scores
Both Nikon D5600 and Nikon D3200 sensors have been tested by DxoMark. DxoMark scores camera sensors for color depth (DXO Portrait), dynamic range (DXO Landscape) and low-light sensitivity (DXO Sports), and also gives them an overall score. Of the two cameras that we are comparing, D5600 has scored 84, 3 points higher than D3200.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Nikon D5600
84
24.1 bits
14.0 Evs
1306 ISO
Nikon D3200
81
24.1 bits
13.2 Evs
1131 ISO
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Nikon D5600
or the
Nikon D3200 ,
including hyperfocal distance.