6 feet = 182 cm.
https://www.wsj.com/articles/online-dating-investing-match-t...
But counter-anecdote: I visited an ex-gf the other day to borrow something from her new partner, and she actually commented "I forget how tall you are". And it wasn't a positive thing, it was quite explicitly "new boyfriend is my height and it's great". Albeit that's 1.5m vs 1.8m so it's quite a difference.
Maybe we need a rule like "half your age plus 7"... "no more than 10% height difference?"
In Australia we have several ethnic communities where the stats for stuff like height diverge noticeably from the national stats. So "immigrated from The Netherlands" as a category will be taller by a few percent, "immigrated from China" will be shorter and have greater sexual dimorphism.
https://www.gigacalculator.com/calculators/height-percentile...