It's alright. Before I did the research necessary for this chart, I thought both Bass and Proto Man were taller than Mega Man, but it turns out they're all the same height. I was wondering why this seems to be such a common misconception, and I'm still not sure why.
As for Kalinka, I was going with what I saw in official artwork, since that outnumbers her single sprite appearance. I will say, though, that the NES sprites of the series tend to not be the best indicator for height, since the combination of sprite size limitations on the NES, coupled with the fact that the sprites are modeled after an SD (or "chibi", if you prefer) art style, tends to give some weird results. Unless you want to believe that Guts Man and Air Man are the same height:
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