I have it:
TabHost tabHost = getTabHost();
Add code to add tabs to the host tab ... and then finally
tabHost.getTabWidget().getChildAt(0).getLayoutParams().height = 25;
tabHost.getTabWidget().getChildAt(1).getLayoutParams().height = 30;
tabHost.getTabWidget().getChildAt(2).getLayoutParams().height = 35;
tabHost.getTabWidget().getChildAt(3).getLayoutParams().height = 50;
Which (if you do not have a photo), it turns out the following: 
, 35 - . , dpi.