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

order	title
0	三种大小

三种大小的选择框，当 size 分别为 large 和 small 时，输入框高度为 32px 和 22px ，默认高度为 28px

import { Select } from 'antd';
const Option = Select.Option;

function handleChange(value) {
  console.log(`selected ${value}`);
}

ReactDOM.render(
  <div>
    <Select size="large" defaultValue="lucy" style={{ width: 200 }} onChange={handleChange}>
      <Option value="jack">Jack</Option>
      <Option value="lucy">Lucy</Option>
      <Option value="disabled" disabled>Disabled</Option>
      <Option value="yiminghe">yiminghe</Option>
    </Select>
    <Select defaultValue="lucy" style={{ width: 200 }} onChange={handleChange}>
      <Option value="jack">Jack</Option>
      <Option value="lucy">Lucy</Option>
      <Option value="disabled" disabled>Disabled</Option>
      <Option value="yiminghe">yiminghe</Option>
    </Select>
    <Select size="small" defaultValue="lucy" style={{ width: 200 }} onChange={handleChange}>
      <Option value="jack">Jack</Option>
      <Option value="lucy">Lucy</Option>
      <Option value="disabled" disabled>Disabled</Option>
      <Option value="yiminghe">yiminghe</Option>
    </Select>
  </div>
, mountNode);

.code-box-demo .ant-select {
  margin: 0 8px 10px 0;
}