If you're writing medieval-esque fantasy, absolutely. The tape measure wasn't invented until the nineteenth century, as I recall...
Noah must have had some sort of cubit stick, though.
As I read the back and forth in this thread, I really wonder what sort of wall people are running into with fantasy and measurements. It isn't that you have to convert inches into fingers or seconds into moments - what is happening in a fantasy story that requires this very modern, time driven view of life that can't be described without an integer reference system?
I just finished a very fantasy-like SF novel (from Peter Hamilton's
Void series), and I can't recall the author referring to time or distance for ordinary action at all, unless we're counting "the sun was low by the time he arrived home". Some places could be traveled to in the same day, some took multiple days. Some people "towered", others were "average in height".
If time has passed, the character was likely doing or thinking about something in that time or distance, so why not write about what happened instead of jumping forward in reference to a measurement? If there is a measurement, it is likely to compare. Why's the comparison important.
One hour = replied to some letters and drank tea from a distant land.
5 minutes = had a reverie about the woman he's rescuing.
30 minutes = made herself lunch - the first in days.
Walked far enough uphill to sweat in the cool air.
He watched the tide had come and go, allowing her return along the sandbar.
He reached up, stretching on one toe.
Lars bow was longer and thicker, converting his great strength to great range.
Affording to employ the finest masons, Thebes' buildings towered.
Fill in the blanks!
Ideally, your writing would fill every waking moment in the depicted life of your characters, and every pause or stretch is the time for the character fill in backstory with their thoughts, letters, aching old wounds, uncomfortable stolen shoes, wariness of watchers, etc. (
Not like Proust.) But a simple statement can both describe the passage of time and serve to describe something, so it doesn't need to be in an info dump somewhere else. "Five minutes later" is a lost opportunity to tell a story, not an important description.
If that isn't going to work, could people maybe post a paragraph showing the conundrum?