Flutter text font size customization. In this easy Flutter post, you’ll see a simple Flutter example for changing Flutter text font size in Flutter apps. We’ll discuss each and everything about Flutter text font size so that you’ll be able to easily customize Flutter text font size in your own Flutter code as well. Let’s not hold off more and begin customizing Flutter text font size.
Outline
- What is Flutter Text Font Size?
- Default Flutter Text Font Size
- Change Flutter Text Font Size
- Flutter Text Font Size Implementation Source Code
- Conclusion
What is Flutter Text Font Size?
Flutter text font size as the name suggests, it is the size of text in Flutter text widget. First we will see what the default Flutter text font size looks like and then we will practically change the font size of Flutter text. So let’s get started with an easy Flutter example.
Default Flutter Text Font Size
In order to see what the default font size of Flutter text is, we have to define a simple Flutter text widget with some text. See the below code:
Text( 'This is the default Flutter text font size' )

Change Flutter Text Font Size
To change the Flutter text font size, we have to use the style constructor of the Flutter text widget class and pass text style class to it. Then by using the font size constructor of the text style class, we can easily change the font size of text in Flutter text widget. This font size constructor takes a double(decimal) value but we can also pass integer to it(it will automatically convert it). For demonstration, we have passed 23 to it. See the below code:
Text( 'This is the custom Flutter text fontsize', style: TextStyle(fontSize: 23), )

Flutter Text Font Size Implementation Source Code
import 'package:flutter/material.dart'; void main() { runApp(const MyApp()); } class MyApp extends StatelessWidget { const MyApp({Key? key}) : super(key: key); @override Widget build(BuildContext context) { return MaterialApp( debugShowCheckedModeBanner: false, home: Homepage(), ); } } class Homepage extends StatelessWidget { @override Widget build(BuildContext context) { return SafeArea( child: Scaffold( body: Center( child: Padding( padding: const EdgeInsets.all(15), child: Text( 'This is the custom Flutter text fontsize', style: TextStyle(fontSize: 23), ), ), ))); } }
Conclusion
As conclusion, we now know how to practically implement and change Flutter text font size in Flutter text widget. I would be looking forward to hear what you think about this article in the comments. I also have prepared other informative articles on Flutter widgets, amazing Flutter templates with free source code, Flutter app development, Flutter animations, Flutter books and more. Links to some of these mentioned posts can be found listed below. Others can be found using the menu navigation bar or search box. Thank you for reading this post.
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