All measurements are of the floor to the top of the head and when the figure is standing in the pictured pose (the bottom of the text is the "line"). Assume a slight margin of measuring error.
Regular Kreons 1.75in - to give an idea of comparison
Regular Combiners - Computron/Abominus/other combiners 4.4in
Metroplex 2.0/Fortress Maximus 2.0/Scorponok 2.0 7.5in
Omega Supreme 2.0/Devastator 2.0/Predaking 3.0 4.8in
Optimus Prime Cab,Trailer 2.5 in long, 1in high
Quintesson Judge/Prosecutor 1.75in
Rewind/Eject, Ravage, Steeljaw, Ramhorn - 1.1in
Sharkticon - Almost 2 inches tall to the top of the spike when mouth is closed
Sky Lynx (Combined mode) 4.5in
Trypticon 2.0 6.5in - Trypticon can stand tall or lean forward. It depends on how you position the legs and tail (he can stand taller than pictured).