change size of icon font-awesome react native code example

Example: change size of font awesome icon react

const React = require('react')
import { Form, FormControl, FormGroup, ControlLabel, Col, Button, Tooltip, OverlayTrigger } from 'react-bootstrap'
import FaFolderOpen from 'react-icons/lib/fa/folder-open'
import FaFileCodeO from 'react-icons/lib/fa/file-code-o'
import FaFolderOpen from 'react-icons/lib/fa/folder-open'
import FaFileCodeO from 'react-icons/lib/fa/file-code-o'

<Button type="button" bsStyle="success" block onClick={(e) => folderChooser(e)}>
     <FaFolderOpen />
</Button>