Below you can see the front-view size comparison of the Leica D-Lux Typ 109 and Leica Q. The Leica D-Lux Typ 109 is clearly the smaller of the two cameras. Its body is 12mm narrower, 14 mm shorter and 38 mm thinner than the Leica Q.
The chart below depicts how two cameras compare with average dimensions of the cameras in their class.