diff --git a/README.md b/README.md
index 00b53367..e7af1fe6 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,7 @@ CAD program, and create G-Code for Isolation routing.
 - finished the Minimum Distance Tool in case of using it at the object level (not in Editors)
 - completed the Minimum Distance Tool by adding the usage in Editors
 - made the Minimum Distance Tool more precise for the Excellon Editor since in the Excellon Editor the holes shape are represented as a cross line but in reality they should be evaluated as circles
+- small change in the UI layout for Check Rules Tool by adding a new rule (Check trace size)
 
 29.09.2019
 
diff --git a/flatcamTools/ToolRulesCheck.py b/flatcamTools/ToolRulesCheck.py
index 1dd1ca55..ec5470da 100644
--- a/flatcamTools/ToolRulesCheck.py
+++ b/flatcamTools/ToolRulesCheck.py
@@ -253,6 +253,23 @@ class RulesCheck(FlatCAMTool):
 
         self.form_layout_1.addRow(QtWidgets.QLabel(""))
 
+        # Trace size
+        self.trace_size_cb = FCCheckBox('%s:' % _("Trace Size"))
+        self.trace_size_cb.setToolTip(
+            _("This checks if the minimum size for traces is met.")
+        )
+        self.form_layout_1.addRow(self.trace_size_cb)
+
+        # Copper2copper clearance value
+        self.trace_size_entry = FCEntry()
+        self.trace_size_lbl = QtWidgets.QLabel('%s:' % _("Min value"))
+        self.trace_size_lbl.setToolTip(
+            _("Minimum acceptable clearance value.")
+        )
+        self.form_layout_1.addRow(self.trace_size_lbl, self.trace_size_entry)
+
+        self.ts = OptionalInputSection(self.trace_size_cb, [self.trace_size_lbl, self.trace_size_entry])
+
         # Copper2copper clearance
         self.clearance_copper2copper_cb = FCCheckBox('%s:' % _("Copper to copper clearance"))
         self.clearance_copper2copper_cb.setToolTip(