ant-design/components/radio/demo/size.tsx

import React from 'react';
import { Flex, Radio } from 'antd';

const App: React.FC = () => (
  <Flex vertical gap="middle">
    <Radio.Group defaultValue="a" size="large">
      <Radio.Button value="a">Hangzhou</Radio.Button>
      <Radio.Button value="b">Shanghai</Radio.Button>
      <Radio.Button value="c">Beijing</Radio.Button>
      <Radio.Button value="d">Chengdu</Radio.Button>
    </Radio.Group>
    <Radio.Group defaultValue="a">
      <Radio.Button value="a">Hangzhou</Radio.Button>
      <Radio.Button value="b">Shanghai</Radio.Button>
      <Radio.Button value="c">Beijing</Radio.Button>
      <Radio.Button value="d">Chengdu</Radio.Button>
    </Radio.Group>
    <Radio.Group defaultValue="a" size="small">
      <Radio.Button value="a">Hangzhou</Radio.Button>
      <Radio.Button value="b">Shanghai</Radio.Button>
      <Radio.Button value="c">Beijing</Radio.Button>
      <Radio.Button value="d">Chengdu</Radio.Button>
    </Radio.Group>
  </Flex>
);

export default App;