Answer by Tobias for Material icon size adjustment in Jetpack Compose?

What works for me is to use Modifier.fillMaxSize(...)), e.g.

Icon(Icons.Filled.Person, contentDescription = "Person", modifier = Modifier.fillMaxSize(0.5F))

Icon(Icons.Filled.Person, contentDescription = "Person", modifier = Modifier.fillMaxSize(0.75F))

Icon(Icons.Filled.Person, contentDescription = "Person", modifier = Modifier.fillMaxSize(1.0F))