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

import React, { useState } from 'react';
import { Radio, Select, Space } from 'antd';
import type { ConfigProviderProps, RadioChangeEvent, SelectProps } from 'antd';

type SizeType = ConfigProviderProps['componentSize'];

const options: SelectProps['options'] = [];

for (let i = 10; i < 36; i++) {
  options.push({
    value: i.toString(36) + i,
    label: i.toString(36) + i,
  });
}

const handleChange = (value: string | string[]) => {
  console.log(`Selected: ${value}`);
};

const App: React.FC = () => {
  const [size, setSize] = useState<SizeType>('middle');

  const handleSizeChange = (e: RadioChangeEvent) => {
    setSize(e.target.value);
  };

  return (
    <>
      <Radio.Group value={size} onChange={handleSizeChange}>
        <Radio.Button value="large">Large</Radio.Button>
        <Radio.Button value="middle">Default</Radio.Button>
        <Radio.Button value="small">Small</Radio.Button>
      </Radio.Group>
      <br />
      <br />
      <Space direction="vertical" style={{ width: '100%' }}>
        <Select
          size={size}
          defaultValue="a1"
          onChange={handleChange}
          style={{ width: 200 }}
          options={options}
        />
        <Select
          mode="multiple"
          size={size}
          placeholder="Please select"
          defaultValue={['a10', 'c12']}
          onChange={handleChange}
          style={{ width: '100%' }}
          options={options}
        />
        <Select
          mode="tags"
          size={size}
          placeholder="Please select"
          defaultValue={['a10', 'c12']}
          onChange={handleChange}
          style={{ width: '100%' }}
          options={options}
        />
      </Space>
    </>
  );
};

export default App;