I’m good with intuiting 1-3 meters, and I have a decent estimate for 1 centimeter. Beyond that, about all I got (yes I know this is all very rough estimates) is “a kilogram is a couple pounds, a kilometer is a short mile, a liter is basically a quart”. But I guess I don’t even have a good intuition for a quart because that in my head rests at the crossroads of “4 cups or ¼ gallon”.

Make metric meaningful early in life, or actively make referencing real metric measures a part of your life, if you want it to stick.