See, I can answer this easily. 1/6 means it is 1/6th scaled to a 1/1 human. Typically, that means a 6’ person would be a 12” tall figure at 1/6th scaling. If, say, Chris Evans as Cap is a 6’ person (he is) then his figure should stand around 12” (give or take boots; he’s at 12.6” here).
Now, Sub-Zero and Scorpion, based on the above photo, are around 29.5cm, or 11.6”. That comes out to being a 5’8” fella. That’s my height. But the two are canonically listed as 6’2”. They’re not just shorter than Cap; they’re half-a-foot off based on 1/6th scaling.
That will bother some people more than others. Does it bother me? Yes. I want a proper 1/6 scale figure. They aren’t. But I also am not bothered enough to the point I won’t be glad to have them on my shelf.