C-type asteroid
The largest unequivocally C-type asteroid is 10 Hygiea, although the SMASS classification places the largest asteroid, 1 Ceres, here as well, because that scheme lacks a G-type.
Enstatite chondrite
The largest known E-type chondrite in the asteroid belt may be 21 Lutetia, with a diameter of approximately , based on observations from the "Rosetta" spacecraft, ESO's New Technology Telescope, NASA Infrared Telescope Facility, and the Spitzer Space Telescope.