It would have been larger than the 250 km ( 160 mi ) Sudbury Basin and the 180 km ( 110 mi ) Chicxulub Crater .
The crater has a diameter of roughly 250-300 km ( 160-190 mi ) , larger than the 200 km ( 120 mi ) Sudbury Basin and the 170 km ( 110 mi ) Chicxulub crater .