diff --git a/compiler/base/utils.py b/compiler/base/utils.py
index 1c85049b..b476e778 100644
--- a/compiler/base/utils.py
+++ b/compiler/base/utils.py
@@ -73,7 +73,7 @@ def auto_measure_libcell(pin_list, name, units, lpp):
     return cell
 
 
-def get_gds_size(name, gds_filename, units, lpp, structure = ""):
+def get_gds_size(name, gds_filename, units, lpp):
     """
     Open a GDS file and return the size from either the
     bounding box or a border layer.
@@ -83,7 +83,7 @@ def get_gds_size(name, gds_filename, units, lpp, structure = ""):
     reader = gdsMill.Gds2reader(cell_vlsi)
     reader.loadFromFile(gds_filename)
 
-    measure_result = cell_vlsi.getLayoutBorder(lpp, structure)
+    measure_result = cell_vlsi.getLayoutBorder(lpp)
     if not measure_result:
         debug.info(2, "Layout border failed. Trying to measure size for {}".format(name))
         measure_result = cell_vlsi.measureSize(name)
@@ -91,15 +91,14 @@ def get_gds_size(name, gds_filename, units, lpp, structure = ""):
     return measure_result
 
 
-def get_libcell_size(name, units, lpp, structure = ""):
+def get_libcell_size(name, units, lpp):
     """
     Open a GDS file and return the library cell size from either the
     bounding box or a border layer.
     """
 
     cell_gds = OPTS.openram_tech + "gds_lib/" + str(name) + ".gds"
-    return(get_gds_size(name, cell_gds, units, lpp, structure))
-
+    return(get_gds_size(name, cell_gds, units, lpp))
 
 
 def get_gds_pins(pin_names, name, gds_filename, units):
diff --git a/compiler/custom/s8_bitcell.py b/compiler/custom/s8_bitcell.py
index fff3a6b8..a3e56885 100644
--- a/compiler/custom/s8_bitcell.py
+++ b/compiler/custom/s8_bitcell.py
@@ -41,10 +41,8 @@ class s8_bitcell(bitcell_base.bitcell_base):
 
         if version == "opt1":
             self.name = "s8sram_cell_opt1"
-            self.border_structure = "s8sram_cell"
         elif version == "opt1a":
             self.name = "s8sram_cell_opt1a"
-            self.border_structure = "s8sram_cell"
             
         bitcell_base.bitcell_base.__init__(self, self.name)
         debug.info(2, "Create bitcell")
diff --git a/compiler/custom/s8_col_end.py b/compiler/custom/s8_col_end.py
index 5c9c4b92..869c589c 100644
--- a/compiler/custom/s8_col_end.py
+++ b/compiler/custom/s8_col_end.py
@@ -22,16 +22,12 @@ class s8_col_end(design.design):
 
         if version == "colend":
             self.name = "s8sram16x16_colend"
-            structure = "s8sram16x16_colend"
         elif version == "colend_p_cent":
             self.name = "s8sram16x16_colend_p_cent"
-            structure = "s8sram16x16_colend_p_cent\x00"
         elif version == "colenda":
             self.name = "s8sram16x16_colenda"
-            structure = "s8sram16x16_colenda\x00"
         elif version == "colenda_p_cent":
             self.name = "s8sram16x16_colenda_p_cent"
-            structure = "s8sram16x16_colenda_p_cent"
         else:
             debug.error("Invalid type for col_end", -1)
         design.design.__init__(self, name=self.name)
@@ -42,4 +38,4 @@ class s8_col_end(design.design):
         pin_map = utils.get_libcell_pins(pin_names, self.name, GDS["unit"])
 
 
-    
\ No newline at end of file
+    
diff --git a/compiler/custom/s8_internal.py b/compiler/custom/s8_internal.py
index 2d1ed5b9..4afcbf6d 100644
--- a/compiler/custom/s8_internal.py
+++ b/compiler/custom/s8_internal.py
@@ -22,18 +22,14 @@ class s8_internal(design.design):
         
         if version == "wlstrap":
             self.name = "s8sram_wlstrap"
-            self.structure = "s8sram_wlstrap_ce\x00"
         elif version == "wlstrap_p":
             self.name = "s8sram16x16_wlstrap_p"
-            self.structure = "s8sram16x16_wlstrap_p_ce"
         elif version == "wlstrapa":
             self.name = "s8sram_wlstrapa"
-            self.structure = "s8sram_wlstrapa_ce"
         else:
             debug.error("Invalid version", -1)
         design.design.__init__(self, name=self.name)
         (self.width, self.height) = utils.get_libcell_size(self.name,
                                         GDS["unit"],
-                                        layer["mem"],
-                                        self.structure)
-        pin_map = utils.get_libcell_pins(pin_names, self.name, GDS["unit"])
\ No newline at end of file
+                                        layer["mem"])
+        pin_map = utils.get_libcell_pins(pin_names, self.name, GDS["unit"])
diff --git a/compiler/gdsMill/gdsMill/vlsiLayout.py b/compiler/gdsMill/gdsMill/vlsiLayout.py
index cd9b6efe..19018119 100644
--- a/compiler/gdsMill/gdsMill/vlsiLayout.py
+++ b/compiler/gdsMill/gdsMill/vlsiLayout.py
@@ -597,20 +597,20 @@ class VlsiLayout:
         if structure == "":
             structure = self.rootStructureName
         cellSizeMicron = None
-        for boundary in self.structures[structure].boundaries:
-            if sameLPP((boundary.drawingLayer, boundary.purposeLayer),
-                       lpp):
-                if self.debug:
-                    debug.info(1, "Find border "+str(boundary.coordinates))
-                left_bottom = boundary.coordinates[0]
-                right_top = boundary.coordinates[2]
-                cellSize = [right_top[0]-left_bottom[0],
-                            right_top[1]-left_bottom[1]]
-                cellSizeMicron = [cellSize[0]*self.units[0],
-                                  cellSize[1]*self.units[0]]
-        debug.check(cellSizeMicron,
-                    "Error: "+str(structure)+".cell_size information not found yet")
 
+        shapes = self.getAllShapes(lpp)
+        if len(shapes) != 1:
+            debug.warning("More than one boundary found in cell: {}".format(structure))
+        debug.check(len(shapes) != 0,
+                    "Error: "+str(structure)+".cell_size information not found yet")
+        max_boundary = None
+        max_area = 0
+        for boundary in shapes:
+            new_area = boundaryArea(boundary)
+            if not max_boundary or new_area > max_area:
+                max_boundary = boundary
+                max_area = new_area
+        cellSizeMicron = [max_boundary[2], max_boundary[3]]
         return cellSizeMicron
 
     def measureSize(self, startStructure):