In the past, I have always bought pants and had them professionally hemmed by a seamstress.
Never really made an effort to find my best ideal inseam.
Then I discovered, for a short man, 26in or about 66cm was the ideal.
Now going through an airport, my pants dont really fall down, and I dont trip over extra long hemmed pants for tall men.
25.5in would have been ideal, if under 5.10 made them, but I am happy with 26in.