diff --git a/extensions/fablabchemnitz/lasercut_jigsaw/lasercut_jigsaw.inx b/extensions/fablabchemnitz/lasercut_jigsaw/lasercut_jigsaw.inx
index 5731b608..cf15e8a4 100644
--- a/extensions/fablabchemnitz/lasercut_jigsaw/lasercut_jigsaw.inx
+++ b/extensions/fablabchemnitz/lasercut_jigsaw/lasercut_jigsaw.inx
@@ -10,8 +10,12 @@
       </page>
       <page name="Dimensions" gui-text="Dimensions">
          <label>Define the Jigsaw size and grid size.</label>
-         <param name="width" type="float" min="0.1" max="1000.0" precision="2" gui-text="Width" gui-description="The Box Width - in the X dimension">100.0</param>
-         <param name="height" type="float" min="0.1" max="1000.0" precision="2" gui-text="Height" gui-description="The Box Height - in the Y dimension">80.0</param>
+         <param name="sizetype" gui-text="Width/Height for ..." type="optiongroup" appearance="radio">
+            <option value="boxsize">box size</option>
+            <option value="partsize">part size</option>
+         </param>
+         <param name="width" type="float" min="0.1" max="1000.0" precision="2" gui-text="Width">100.0</param>
+         <param name="height" type="float" min="0.1" max="1000.0" precision="2" gui-text="Height">80.0</param>
          <param name="innerradius" type="float" min="0.0" max="500.0" precision="2" gui-text="Corner radius" gui-description="0 implies square corners">5.0</param>
          <param name="units" gui-text="Units" type="optiongroup" appearance="combo" gui-description="The unit of the box dimensions">
             <option value="px">px</option>
@@ -28,8 +32,8 @@
             <option value="Below">Below</option>
             <option value="Separate">Separate</option>
          </param>
-         <param name="pieces_W" type="int" min="2" max="199" gui-text="How many pieces across">5</param>
-         <param name="pieces_H" type="int" min="2" max="199" gui-text="How many pieces down">4</param>
+         <param name="pieces_W" type="int" min="2" max="199" gui-text="How many pieces across (cols)">5</param>
+         <param name="pieces_H" type="int" min="2" max="199" gui-text="How many pieces down (rows)">4</param>
       </page>
       <page name="Notches" gui-text="Notches">
          <label>The interlocking pieces can be shaped here. Also the random nature of the layout.</label>
diff --git a/extensions/fablabchemnitz/lasercut_jigsaw/lasercut_jigsaw.py b/extensions/fablabchemnitz/lasercut_jigsaw/lasercut_jigsaw.py
index dc4890c2..2b211908 100644
--- a/extensions/fablabchemnitz/lasercut_jigsaw/lasercut_jigsaw.py
+++ b/extensions/fablabchemnitz/lasercut_jigsaw/lasercut_jigsaw.py
@@ -115,8 +115,9 @@ class LasercutJigsaw(inkex.EffectExtension):
         pars.add_argument("--color_jigsaw", type=Color, default='65535', help="Jigsaw lines color")
          
         #Dimensions
-        pars.add_argument("--width", type=float, default=50.0, help="The Box Width - in the X dimension")
-        pars.add_argument("--height", type=float, default=30.0, help="The Box Height - in the Y dimension")
+        pars.add_argument("--sizetype", default="boxsize")
+        pars.add_argument("--width", type=float, default=50.0)
+        pars.add_argument("--height", type=float, default=30.0)
         pars.add_argument("--innerradius", type=float, default=5.0, help="0 implies square corners")
         pars.add_argument("--units", default="cm", help="The unit of the box dimensions")
         pars.add_argument("--border", type=inkex.Boolean, default=False, help="Add Outer Surround")
@@ -402,6 +403,7 @@ class LasercutJigsaw(inkex.EffectExtension):
                 row += 1
                 col -= self.options.pieces_W
             col += 1
+        return jigsaw_pieces_id
 
     def effect(self):
         
@@ -418,10 +420,15 @@ class LasercutJigsaw(inkex.EffectExtension):
         docH = self.svg.unittouu(self.document.getroot().get('height'))
         
         # extract fields from UI
-        self.width  = self.svg.unittouu( str(self.options.width)  + self.options.units )
-        self.height  = self.svg.unittouu( str(self.options.height) + self.options.units )
+        self.width = self.svg.unittouu( str(self.options.width)  + self.options.units )
+        self.height = self.svg.unittouu( str(self.options.height) + self.options.units )
         self.pieces_W = self.options.pieces_W
         self.pieces_H = self.options.pieces_H
+        
+        if self.options.sizetype == "partsize":
+           self.width = self.width *  self.pieces_W
+           self.height = self.height *  self.pieces_H
+           
         average_block = (self.width/self.pieces_W + self.height/self.pieces_H) / 2
         self.notch_step = average_block * self.options.notch_percent / 3 # 3 = a useful notch size factor
         self.smooth_edges = self.options.smooth_edges
@@ -442,8 +449,7 @@ class LasercutJigsaw(inkex.EffectExtension):
         
         #
         # set up the main object in the current layer - group gridlines
-        g_attribs = {inkex.addNS('label','inkscape'):'Jigsaw:X' + \
-                     str( self.pieces_W )+':Y'+str( self.pieces_H ) }
+        g_attribs = {inkex.addNS('label','inkscape'):'Jigsaw:X' + str(self.pieces_W )+':Y'+str(self.pieces_H)  + "={}Pcs)".format(self.pieces_W * self.pieces_H)}
         jigsaw_group = etree.SubElement(self.svg.get_current_layer(), 'g', g_attribs)
         #Group for X grid
         g_attribs = {inkex.addNS('label','inkscape'):'X_Gridlines'}
@@ -487,12 +493,16 @@ class LasercutJigsaw(inkex.EffectExtension):
         # center the jigsaw
         jigsaw_group.set('transform', 'translate(%f,%f)' % ( (docW-self.width)/2, (docH-self.height)/2 ) )
         
+        #inkex.utils.debug("Your puzzle consists out of {} pieces.".format(self.pieces_W * self.pieces_H))
+        
         # pieces
         if self.pieces:
             gridx.delete() #delete the previous x generated stuff because we have single pieces instead!
             gridy.delete() #delete the previous y generated stuff because we have single pieces instead!
             jigsaw_group.getchildren()[0].delete() #delete inner border
-            self.create_pieces(jigsaw_group, gridx,gridy)
-       
+            jigsaw_pieces_id = self.create_pieces(jigsaw_group, gridx,gridy)
+            for jigsaw_piece in self.svg.getElementById(jigsaw_pieces_id).getchildren():
+                jigsaw_piece.attrib['id'] =  jigsaw_pieces_id + "_" + jigsaw_piece.attrib['id']
+
 if __name__ == '__main__':
     LasercutJigsaw().run()
\ No newline at end of file