--- a/qrurls/admin.py	Wed Nov 05 10:27:01 2014 +0100
+++ b/qrurls/admin.py	Wed Nov 05 10:35:51 2014 +0100
@@ -155,7 +155,9 @@
         #image = forms.ImageField()
 
         # Existing URLImages
-        url_images = forms.ModelMultipleChoiceField(queryset=URLImage.objects.all())
+        url_images = forms.ModelMultipleChoiceField(queryset=URLImage.objects.all(),
+                widget  = forms.SelectMultiple(attrs={'size': 20}),
+        )
 
     def import_images_handler (self, url_feed, data, images=()) :
         """Custom for backend for mass-importing images into a feed."""