[psd1]

Reassuringly anachronistic to use acres as a unit of measure on the moon.

[p1mrx]

For historical reasons, a moon acre is approximately 16.7% smaller than an earth acre.

[samatman]

It's an official unit of the only flag on the Moon to date. What else would you suggest?

[ceejayoz]

It’s not the only flag.

https://web.archive.org/web/20220725003858/https://www.space...

[lunakid]

Maybe the same units basically everybody has always ever used (in earnest) for space tech (including NASA)?

[p1mrx]

m²