diff --git a/invesalius/data/styles.py b/invesalius/data/styles.py
index b6b607d..c38ac59 100644
--- a/invesalius/data/styles.py
+++ b/invesalius/data/styles.py
@@ -706,7 +706,7 @@ class EditorInteractorStyle(DefaultInteractorStyle):
             size = cursor.radius * 2
             size += 1
 
-            if size < 100:
+            if size <= 100:
                 Publisher.sendMessage('Set edition brush size', size)
                 cursor.SetPosition(cursor.position)
                 self.viewer.interactor.Render()
diff --git a/invesalius/gui/task_slice.py b/invesalius/gui/task_slice.py
index 2b3582e..b7471c1 100644
--- a/invesalius/gui/task_slice.py
+++ b/invesalius/gui/task_slice.py
@@ -740,6 +740,7 @@ class EditionTools(wx.Panel):
                                         'Update threshold limits')
         Publisher.subscribe(self.ChangeMaskColour, 'Change mask colour')
         Publisher.subscribe(self.SetGradientColour, 'Add mask')
+        Publisher.subscribe(self._set_brush_size, 'Set edition brush size')
 
     def ChangeMaskColour(self, pubsub_evt):
         colour = pubsub_evt.data
@@ -792,6 +793,10 @@ class EditionTools(wx.Panel):
         # Strangelly this is being called twice
         Publisher.sendMessage('Set edition brush size',self.spin.GetValue())
 
+    def _set_brush_size(self, pubsub_evt):
+        size = pubsub_evt.data
+        self.spin.SetValue(size)
+
     def OnComboBrushOp(self, evt):
         brush_op_id = evt.GetSelection()
         Publisher.sendMessage('Set edition operation', brush_op_id)
--
libgit2 0.21.2