--- a/src/pyams_file/widget/__init__.py	Sun Jan 14 12:49:15 2018 +0100
+++ b/src/pyams_file/widget/__init__.py	Wed Jan 17 09:16:58 2018 +0100
@@ -100,10 +100,10 @@
     def get_human_size(self, value):
         return get_human_size(value, self.request)
 
-    def get_thumbnail(self):
+    def get_thumbnail(self, geometry='128x128'):
         thumbnails = IThumbnail(self.current_value, None)
         if thumbnails is not None:
-            display = thumbnails.get_thumbnail('128x128')
+            display = thumbnails.get_thumbnail(geometry)
             if display is not None:
                 return '{0}?_={1}'.format(absolute_url(display, self.request), self.timestamp)
         name, ext = os.path.splitext(self.current_value.filename)