I just noticed, Ms Reed must be tall! She's a bit taller than Hannelore, who Jeph has said to be rather tall for a woman. No less, she seem to be slightly taller or about the same height as Jim, and much more so than Marten. Marten and Hannelore are about equally tall, so do we get maybe 175 cm for Marten and around 185 for Veronica? She must be used to it by now.
175cm wouldn't be
very tall for a woman, though, and rather short, though not extremely short, for a guy. I would put Marten more at 180cm. 185cm for Veronica seems about right. Of course, this is pure guesswork. The characters have also changed height during the comic and sometimes it's hard to tell their relative heights due to perspective.
Is 185 cm extremely tall for a woman in the US? In Germany, it is very tall, but I know quite a few women that tall; it's not rare among women my age to be 180cm or taller, though apparently pretty rare in the overall population according to Wikipedia. I am not sure I trust Wikipedia there; if their statistics are true, my circle of friends and acquaintances is quite a statistical anomaly...
I am 172 cm, which is above average, but not by much at least in my age group.