diff --git a/extensions/fablabchemnitz_boundingbox.inx b/extensions/fablabchemnitz_boundingbox.inx
index 5a176a4a..fb8253b2 100644
--- a/extensions/fablabchemnitz_boundingbox.inx
+++ b/extensions/fablabchemnitz_boundingbox.inx
@@ -4,6 +4,8 @@
     <id>fablabchemnitz.de.boundingbox</id>
     <param name="help_text" type="description">Draws bounding boxes around selected objects, useful for debugging. Author: Pawel Mosakowski. Modded by Mario Voigt.</param>
     <param min="-10000.0" max="10000.0" name="offset" type="float" gui-text="Offset from object (all directions)">0.0</param>
+    <param name="box" type="bool" gui-text="Draw boxes">true</param>
+    <param name="circle" type="bool" gui-text="Draw circles">false</param>
     <effect>
         <object-type>all</object-type>
         <effects-menu>
diff --git a/extensions/fablabchemnitz_boundingbox.py b/extensions/fablabchemnitz_boundingbox.py
index ab779568..4833de41 100644
--- a/extensions/fablabchemnitz_boundingbox.py
+++ b/extensions/fablabchemnitz_boundingbox.py
@@ -1,24 +1,39 @@
 #!/usr/bin/env python3
 
 import inkex
+import math
 from lxml import etree
 
 class DrawBBoxes(inkex.Effect):
     def __init__(self):
         inkex.Effect.__init__(self)
         self.arg_parser.add_argument('--offset', type=float, default=0.0, help='Offset from object (all directions)')
-
+        self.arg_parser.add_argument('--box', type=inkex.Boolean, default=0.0, help='Draw boxes')
+        self.arg_parser.add_argument('--circle', type=inkex.Boolean, default=0.0, help='Draw circles')
+		
     def effect(self):
         if len(self.svg.selected) > 0:
             bboxes = [(id, node, node.bounding_box()) for id, node in self.svg.selected.items()]
-            for id, node, bbox in bboxes:
-                attribs = {
-                    'style'     : str(inkex.Style({'stroke':'#ff0000','stroke-width'  : '1','fill':'none'})),
-                    'x'         : str(bbox.left - self.options.offset),
-                    'y'         : str(bbox.top - self.options.offset),
-                    'width'     : str(bbox.width + 2 * self.options.offset),
-                    'height'    : str(bbox.height + 2 * self.options.offset),
-                }
-                etree.SubElement(self.svg.get_current_layer(), inkex.addNS('rect','svg'), attribs )
-
+			
+            if self.options.box:
+                for id, node, bbox in bboxes:
+                    attribs = {
+                        'style' : str(inkex.Style({'stroke':'#ff0000','stroke-width'  : '1','fill':'none'})),
+                        'x'     : str(bbox.left - self.options.offset),
+                        'y'     : str(bbox.top - self.options.offset),
+                        'width' : str(bbox.width + 2 * self.options.offset),
+                        'height': str(bbox.height + 2 * self.options.offset),
+                    }
+                    etree.SubElement(self.svg.get_current_layer(), inkex.addNS('rect','svg'), attribs )
+			    	
+            if self.options.circle:			    	
+                for id, node, bbox in bboxes:
+                    attribs = {
+                        'style': str(inkex.Style({'stroke':'#ff0000','stroke-width'  : '1','fill':'none'})),
+                        'cx'   : str(bbox.center_x),
+                        'cy'   : str(bbox.center_y),
+                        #'r'   : str(bbox.width / 2 + self.options.offset),
+                        'r'    : str(math.sqrt((bbox.width + 2 * self.options.offset)* (bbox.width + 2 * self.options.offset) + (bbox.height + 2 * self.options.offset) * (bbox.height + 2 * self.options.offset)) / 2),
+                    }
+                    etree.SubElement(self.svg.get_current_layer(), inkex.addNS('circle','svg'), attribs )
 DrawBBoxes().run()
\ No newline at end of file