What is the test for determining whether a sentence is disproportionate to the crime?

Under the Eighth Amendment of the federal Constitution, we must assess three factors to determine whether a sentence is disproportionate to the offense: (1) the gravity of the offense and the harshness of the penalty; (2) sentences imposed for other crimes in the same jurisdiction; and (3) sentences imposed for the same crime in other jurisdictions. (Ewing v. California (2003) 538 U.S. 11, 22.) Appellant makes no attempt to present an intrastate comparison of sentences for other crimes or an interstate comparison of sentences for the same crime. His argument fails on this basis alone.