ant-design/components/input-number/demo/size.tsx

import React from 'react';
import { InputNumber, Space } from 'antd';

const onChange = (value: number) => {
  console.log('changed', value);
};

const App: React.FC = () => (
  <Space>
    <InputNumber size="large" min={1} max={100000} defaultValue={3} onChange={onChange} />
    <InputNumber min={1} max={100000} defaultValue={3} onChange={onChange} />
    <InputNumber size="small" min={1} max={100000} defaultValue={3} onChange={onChange} />
  </Space>
);

export default App;