Also, the Berringer Crater (Meteor Crater) in AZ was produced by an object about 100 meters wide, tiny compared with these really big ones. The crater is 3/4 of a mile across.
"Scientists refer to the crater as Barringer Crater in honor of Daniel Barringer, who was first to suggest that it was produced by meteorite impact.[4] The crater is privately owned by the Barringer family through their Barringer Crater Company, which proclaims it to be "best preserved meteorite crater on Earth".[5][6]"