Change Font Size of Text Widget

You can change the font size of text in a Text Widget using style property.

Create a TextStyle object with fontSize and specify this object as style for Text Widget.

A quick code snippet is shown below.

</>
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Text(
	'Hello World!',
	style: TextStyle(fontSize: 25),
),

Change the value for fontSize to change the font size of text in Text Widget.

Example – Change Font Size of Text in Text Widget

Following is a simple example, where we change the font size of text in Text Widget.

lib\main.dart

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import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Tutorial',
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter Tutorial'),
        ),
        body: Center(
          child: Text(
              'Hello World! This is a text widget.',
              style: TextStyle(fontSize: 25),
          ),
        ),
      ),
    );
  }
}

Screenshot

Flutter - Text Widget - Change font size

Now, change the font size to 40 and observe the changes in your application. It should be something like as shown in the folowing screenshot.

Change font size of Text Widget in Flutter

Conclusion

In this Flutter Tutorial, we learned how to change the font size of a Text Widget using TextStyle class.