Définir la taille de l'étiquette dans l'API Google Maps

Ce code est de mettre une légende dans une étiquette de point, mais
comment faire pour modifier la taille de la police?

label: {text: marcadores[i][0], color: 'black', TAGFORFONTSIZE: valuesize}

Mon code:

<html lang='es'> 
<head> 
    <meta charset='UTF-8'> 
    <style type='text/css'> 
        #mapa { height: 500px; } 
    </style> 
    <script type='text/javascript' src='http://maps.google.com/maps/api/js?sensor=false'></script> 
    <script type='text/javascript'> 
        function initialize() { 
            var marcadores = [ 
                ['usu1', -5.31987835340327, -52.8212431459598],
                ['usu4', 42.3617, -3.6789] 
            ]; 

            var map = new google.maps.Map(document.getElementById('mapa'), { 
                zoom: 7, 
                center: new google.maps.LatLng(41.503, -5.744), 
                mapTypeId: google.maps.MapTypeId.ROADMAP 
            }); 

            var infowindow = new google.maps.InfoWindow(); 
            var marker, i; 

            for (i = 0; i < marcadores.length; i++) {   
                marker = new google.maps.Marker({ 
                    position: new google.maps.LatLng(marcadores[i][1], marcadores[i][2]), 
                    map: map, 
                    label: {text: marcadores[i][0], color: 'black'}
                }); 

                google.maps.event.addListener(marker, 'click', (function(marker, i) { 
                     return function() { 
                         infowindow.setContent(marcadores[i][0]); 
                         infowindow.open(map, marker); 
                     } 
                 })(marker, i)); 
             } 
         } 

         google.maps.event.addDomListener(window, 'load', initialize); 
    </script> 
</head> 
<body> 
    <div id='mapa'></div> 
</body> 
</html>

OriginalL'auteur R.Alonso | 2016-11-08