Microscale
Two microscale models designed by Chris Tromans
In the context of Lego, a microscale model is one in which a minifig would look out of place due to being too large. It's generally between about 1:500 and 1:2500 scale.[1]
The Lego Group itself has made a few official microscale sets, but they're mostly made by fans as MOCs.
References
- The Lego Castle Book Jeff Friesen, 2019, ISBN 978-1-71850-016-7, p. xii
Lego scales: Microscale | Minifig scale