Gearscout has a photo with both Glock 19 and Glock 42 for size comparison.
http://blogs.militarytimes.com/gearscout/2014/01/07/peek-glock-42-compared-to-glock-19/
Triangle Tactical has comparison with Remington R51
http://www.triangletactical.net/2014/01/07/glock-42-vs-remington-r51-size-comparison/
From: GearScout, Triangle Tactical
