About this detail of the Tiger
Dimensions are quoted in millimeters, because this is how the designers of the vehicle worked  . In the drawings, green dimensions are copied directly from German design drawings. Blue dimensions are obtained by surveying vehicles, measuring undimensioned drawings, etc. Therefore they can be a few millimeters wrong.
The diagram above shows the dimensions of the turret and mantlet. The asymmetry of the turret is obvious; the mantlet is 110mm wider on the left side  . The turret stands nominally 10mm above the hull top.(The latest version of this article)