diff --git a/icons/measure_density_ellipse28px.png b/icons/measure_density_ellipse28px.png
new file mode 100644
index 0000000..d2113f3
Binary files /dev/null and b/icons/measure_density_ellipse28px.png differ
diff --git a/icons/measure_density_ellipse32px.png b/icons/measure_density_ellipse32px.png
new file mode 100644
index 0000000..e4cb09d
Binary files /dev/null and b/icons/measure_density_ellipse32px.png differ
diff --git a/icons/measure_density_polygon28px.png b/icons/measure_density_polygon28px.png
new file mode 100644
index 0000000..2bacdbf
Binary files /dev/null and b/icons/measure_density_polygon28px.png differ
diff --git a/icons/measure_density_polygon32px.png b/icons/measure_density_polygon32px.png
new file mode 100644
index 0000000..3232e3d
Binary files /dev/null and b/icons/measure_density_polygon32px.png differ
diff --git a/invesalius/gui/frame.py b/invesalius/gui/frame.py
index 29c9978..d9fb36a 100644
--- a/invesalius/gui/frame.py
+++ b/invesalius/gui/frame.py
@@ -1438,9 +1438,11 @@ class ObjectToolBar(AuiToolBar):
             path = os.path.join(d, "measure_angle_original.png")
             BMP_ANGLE = wx.Bitmap(path, wx.BITMAP_TYPE_PNG)
 
-            BMP_ELLIPSE = wx.ArtProvider.GetBitmap(wx.ART_HELP, wx.ART_TOOLBAR, (48, 48))
+            path = os.path.join(d, "measure_density_ellipse32px.png")
+            BMP_ELLIPSE = wx.Bitmap(path, wx.BITMAP_TYPE_PNG)
 
-            BMP_POLYGON = wx.ArtProvider.GetBitmap(wx.ART_GO_DOWN, wx.ART_TOOLBAR, (48, 48))
+            path = os.path.join(d, "measure_density_polygon32px.png")
+            BMP_POLYGON = wx.Bitmap(path, wx.BITMAP_TYPE_PNG)
 
             #path = os.path.join(d, "tool_annotation_original.png")
             #BMP_ANNOTATE = wx.Bitmap(path, wx.BITMAP_TYPE_PNG)
@@ -1467,9 +1469,11 @@ class ObjectToolBar(AuiToolBar):
             path = os.path.join(d, "measure_angle.png")
             BMP_ANGLE = wx.Bitmap(path, wx.BITMAP_TYPE_PNG)
 
-            BMP_ELLIPSE = wx.ArtProvider.GetBitmap(wx.ART_HELP, wx.ART_TOOLBAR, (32, 32))
+            path = os.path.join(d, "measure_density_ellipse28px.png")
+            BMP_ELLIPSE = wx.Bitmap(path, wx.BITMAP_TYPE_PNG)
 
-            BMP_POLYGON = wx.ArtProvider.GetBitmap(wx.ART_GO_DOWN, wx.ART_TOOLBAR, (32, 32))
+            path = os.path.join(d, "measure_density_polygon28px.png")
+            BMP_POLYGON = wx.Bitmap(path, wx.BITMAP_TYPE_PNG)
 
             #path = os.path.join(d, "tool_annotation.png")
             #BMP_ANNOTATE = wx.Bitmap(path, wx.BITMAP_TYPE_PNG)
--
libgit2 0.21.2