Lilliputian

Etymology

From Lilliput, the island in Jonathan Swift’s 1726 satire "Gulliver’s Travels" whose inhabitants stand about six inches tall. Swift used their tiny stature to mock the pomposity of their politics — most memorably a war fought over which end of an egg to crack. The adjective carries both meanings: literally minuscule, and figuratively petty.

adjective · /lil-ih-PYOO-shun/
Very small; also, petty or trivial in scale or outlook.
What it names
Tininess, sometimes with a jab of contempt — reach for it for something diminutive, or for small-minded people whose squabbles are as trivial as they are fierce.
Example
Their lilliputian dispute over office thermostat settings somehow consumed three staff meetings.
Related idea
Diminutive describes small size neutrally or even fondly; lilliputian often adds Swift’s satirical edge, hinting that the smallness is also a smallness of mind.