DropdownButton - padding size between items

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: DropdownButton<String>(
            value: 'one',
            isDense: true,
            onChanged: (String? value) {
              print('on change');
            },
            items: ['one', 'two', 'three'].map<DropdownMenuItem<String>>(
              (value) {
                return DropdownMenuItem<String>(
                    value: value,
                    child: Text(
                      value,
                      style: TextStyle(fontSize: 8),
                    ));
              },
            ).toList(),
          ),
        ),
      ),
    );
  }
}