Asteroid
Although their location in the asteroid belt excludes them from planet status, the three largest objects, Ceres, Vesta, and Pallas, are intact protoplanets that share many characteristics common to planets, and are atypical compared to the majority of "potato"-shaped asteroids. The fourth largest asteroid, Hygiea, has an undifferentiated interior, like the majority of asteroids. Between them, the four largest asteroids constitute half the mass of the asteroid belt.
Near-Earth object
As of January 4, 2019 and mostly using the crude estimate from an absolute magnitude, 897 NEAs listed by CNEOS, including 156 PHAs, measure at least 1 km in diameter, and 8,452 known NEAs are larger than 140 m in diameter.
The smallest known near-Earth asteroid is with an absolute magnitude of 33.2, corresponding to a diameter of about . The largest such object is 1036 Ganymed, with an absolute magnitude of 9.45 and a diameter of about .