Represent QTabWidget's tab text in Qt StyleSheet file?

How can i set the font size of 开发者_开发知识库the tab text for a QTabWidget , with Qt's StyleSheet file ? I just don't know "what" widget is that

QTabWidget { font: 10pt; } 

wasn't helping.

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It's QTabBar.

Have a look at the Customizing QTabWidget and QTabBar docs for info.

This is how to set its font size:

QTabBar::tab { font: 10pt }