Basically, the key benefit of the imperial system is to serve as an ego boost for Americans, which makes them feel special. Furthermore, it caters to their whole persecution complex, believing that the rest of the world is out to "take their guns".
Unfortunately, the truth is that no one else actually cares about their infatuation with old British measurements. Anyone commenting here in favour of metric, is only doing so because of how comically touchy and defensive they get as soon as the topic is raised.
For that cm is used. [This](https://dostawaokien.pl/en/blog/door-sizes) is how the standards seems to look.
> Standard sizes. Most often, these are doors with a width of 80-90 cm and a height of 200-210 cm.
Wow, sure that must have been crazy, right? And if you think "2 by 6 foot" is accurate enough - for customers it's the rough cm value, for practitioners it's mm-precision. Even that 2 by 6 foot will have some standardized calculation to have precision.
And we know our body height, so 210cm vs ~180cm means 30cm is free above your head. No inches and feet and elbows necessary.
e.g what size door would you like sir?
1981mm by 762mm please
one 2’ by 6’ door coming right up
https://www.expressdoorsdirect.co.uk/internal-doors/moulded-internal-doors/premdor-white-moulded-ladder-4-panel-smooth-internal-doors/1981mm-x-762mm-x-44mm-30-premdor-white-moulded-ladder-4-panel-smooth-internal-doors
https://www.leroymerlin.it/prodotti/finestre-porte-e-scale/porte-da-interno/porte-interne/porte-in-legno/porta-battente-strauss-bianco-l-70-x-h-210-cm-reversibile-36103746.html
The UK is a useless comparison, because everything was built before metric was phased in. Of course they still use feet and inches.
Unfortunately, the truth is that no one else actually cares about their infatuation with old British measurements. Anyone commenting here in favour of metric, is only doing so because of how comically touchy and defensive they get as soon as the topic is raised.
Just that 3" by 4" is now called 75mm x 100mm nominal
> Standard sizes. Most often, these are doors with a width of 80-90 cm and a height of 200-210 cm.
Wow, sure that must have been crazy, right? And if you think "2 by 6 foot" is accurate enough - for customers it's the rough cm value, for practitioners it's mm-precision. Even that 2 by 6 foot will have some standardized calculation to have precision.
And we know our body height, so 210cm vs ~180cm means 30cm is free above your head. No inches and feet and elbows necessary.