How do you deal with 1" resolution for person's height? It seems too huge a difference. 2.5cm higher is maybe not that important once you're not teenager any mo

How do you deal with 1" resolution for person's height? It seems too huge a difference. 2.5cm higher is maybe not that important once you're not teenager any more, but it is still quite visible. Also, deciliter is used a lot for volume, especially for drinks. Everyone in Serbia knows that 0.5dl of rakija (brandy) is the way to go and when bar serves 0.3dl they don't respect traditional values :) Also, 2dl is standard cup size and that's intuitive size when we have to estimate deciliter or two for cooking etc.