<div>
    <Radio.Group value={size} onChange={this.handleSizeChange}>
        <Radio.Button value="large">Large</Radio.Button>
        <Radio.Button value="default">Default</Radio.Button>
        <Radio.Button value="small">Small</Radio.Button>
    </Radio.Group>
    <br />
    <br />
    <Button type="primary" size={size}>
        Primary
    </Button>
    <Button size={size}>Normal
    <Button type="dashed" size={size}>
        Dashed
    </Button>
    <Button type="danger" size={size}>
        Danger
    </Button>
    <Button type="link" size={size}>
        Link
    </Button>
    <br />
    <Button type="primary" icon="download" size={size} />
    <Button type="primary" shape="circle" icon="download" size={size} />
    <Button type="primary" shape="round" icon="download" size={size} />
    <Button type="primary" shape="round" icon="download" size={size}>
        Download
    </Button>
    <Button type="primary" icon="download" size={size}>
        Download
    </Button>
    <br />
    <Button.Group size={size}>
        <Button type="primary">
        <Icon type="left" />
        Backward
        </Button>
        <Button type="primary">
        Forward
        <Icon type="right" />
        </Button>
    </Button.Group>
</div>