There is no single, legally mandated or universally followed tradition dictating which finger Latvian men wear their wedding bands on. Unlike some cultures with strictly defined customs (such as the widespread Western tradition of the left-hand ring finger), practice in Latvia varies significantly.
The choice typically comes down to:
Ultimately, a Latvian man may wear his wedding ring on the ring finger of either the left or right hand—or occasionally a different finger entirely—based on what feels right for him and his spouse. There is no "wrong" finger according to Latvian cultural norms.