I understand that people come in all sizes. It even occurs in my family. My son is 6'5" tall while I'm 5'8". However, I want my "little men" to be constant in height. Typically, the first reasonable manufacturer to issue a set for an era tends to set the height requirement for the remainder of that era, as far as I am concerned. Body build and heft should also be consistent. I stopped buying Zvezda and Italeri when they went to the giant 26mm monsters. I will not buy anything that shows a height greater than 25mm. My benchmark is 23mm +/- 1.5mm. I use the Plastic Soldier Review (PSR) height as the guide. HaT is an exception since I buy at least two each of every HaT set as it is issued. They would not be listed in PSR at that time. The HaT Prussians are taller than 25mm but are basically ompatible with the Revell 7YW Prussians.
Again, when a manufacturer decides to "go it alone" on figure size, he loses my money.