ᐅ What size should interior doors be? 90 cm or 100 cm width / 211 cm height?

For very large and heavy people, you need these monster doors. Otherwise, it doesn't make much sense. Are you over 2 meters (6 feet 7 inches) tall and over 150 kilograms (330 pounds) in weight?

A width of one meter (3.3 feet) is practical for when you get older and need walking aids, such as a walker or rollator.

I believe this is less about needing and more about wanting.
And to a large extent, it’s a matter of proportions.
In a house with 70m2 (750 sq ft) of living space on the ground floor and a finished attic, such large doors simply don’t fit, regardless of whether I am 2m (6 ft 7 in) tall or weigh 150 kg (330 lbs).

Olli

Such wide doors naturally require more space to open. A few centimeters of wall space are also lost. But, with all due respect: Even with 150 kg (330 lbs) and 2 meters (6.6 feet) tall, you can get through a 70 cm (28 inch) wide door ^^

As a management consultant, I usually consider myself quite knowledgeable in the field, and just over ten years ago, I was closer to 150 kg than to 2 m (6 ft 7 in).

From an economic perspective, the answer is clear: 213 cm (7 ft) is a height that is currently trending (and therefore increasingly a standard stock size and b. competitively priced), while 226 cm (7 ft 5 in) remains a custom order dimension.

If @Christian NW is only asking about personal preference, I assume none of the residents is exceptionally tall. Without motivation related to body height, there is still a reference point to consider: the lintel height of the windows.

I would want to avoid the impression—warning, perspective distortion!—that the windows appear to be “wearing their hats pulled down too low” when comparing the relation between door lintel height and window lintel height.

My conclusion—as a former building components manufacturer without special expertise in interior doors—is a clear recommendation for the 213 cm (7 ft) door height. Even @blaupuma “can manage with this,” and he has rooms with open gables.

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How persistently you ask for expert opinions
You seem like a funny fellow.

Have you ever presented your building project somewhere as a draft?
I’m curious.