JAVASCRIPT

fontawsome icon size react element

<FontAwesomeIcon icon="spinner" size="xs" />
<FontAwesomeIcon icon="spinner" size="lg" />
<FontAwesomeIcon icon="spinner" size="6x" />

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>