Below you can see the front view size comparison of Fujifilm X100V and Olympus E-M5 III. Olympus E-M5 III is 3mm narrower and 3mm thinner than Fujifilm X100V but it is also 10mm taller.
Fujifilm X100V vs Olympus E-M5 III - Front View
Fujifilm X100V vs Olympus E-M5 III - Top View
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.
Camera Size Comparison
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