diff --git a/src/db/db/dbAsIfFlatRegion.cc b/src/db/db/dbAsIfFlatRegion.cc
index 569200acb..82bd453b1 100644
--- a/src/db/db/dbAsIfFlatRegion.cc
+++ b/src/db/db/dbAsIfFlatRegion.cc
@@ -1278,11 +1278,13 @@ AsIfFlatRegion::sized (coord_type dx, coord_type dy, unsigned int mode) const
 
     //  Generic case
     std::unique_ptr<FlatRegion> new_region (new FlatRegion ());
+    db::PropertyMapper pm (new_region->properties_repository (), properties_repository ());
 
     db::ShapeGenerator pc (new_region->raw_polygons (), false);
     db::PolygonGenerator pg (pc, false, true);
     db::SizingPolygonFilter sf (pg, dx, dy, mode);
     for (RegionIterator p (begin ()); ! p.at_end (); ++p) {
+      pc.set_prop_id (pm (p.prop_id ()));
       sf.put (*p);
     }
 
@@ -1296,6 +1298,10 @@ AsIfFlatRegion::sized (coord_type dx, coord_type dy, unsigned int mode) const
 
   } else {
 
+    std::unique_ptr<FlatRegion> new_region (new FlatRegion ());
+
+//  old implementation without property support
+#if 0
     //  Generic case - the size operation will merge first
     db::EdgeProcessor ep (report_progress (), progress_desc ());
     ep.set_base_verbosity (base_verbosity ());
@@ -1313,13 +1319,26 @@ AsIfFlatRegion::sized (coord_type dx, coord_type dy, unsigned int mode) const
       ep.insert (*p, n);
     }
 
-    std::unique_ptr<FlatRegion> new_region (new FlatRegion ());
     db::ShapeGenerator pc (new_region->raw_polygons (), true /*clear*/);
     db::PolygonGenerator pg2 (pc, false /*don't resolve holes*/, true /*min. coherence*/);
     db::SizingPolygonFilter siz (pg2, dx, dy, mode);
     db::PolygonGenerator pg (siz, false /*don't resolve holes*/, min_coherence () /*min. coherence*/);
     db::BooleanOp op (db::BooleanOp::Or);
     ep.process (pg, op);
+#else
+
+    //  Generic case
+    db::PropertyMapper pm (new_region->properties_repository (), properties_repository ());
+
+    db::ShapeGenerator pc (new_region->raw_polygons (), false);
+    db::PolygonGenerator pg (pc, false, true);
+    db::SizingPolygonFilter sf (pg, dx, dy, mode);
+    for (RegionIterator p (begin_merged ()); ! p.at_end (); ++p) {
+      pc.set_prop_id (pm (p.prop_id ()));
+      sf.put (*p);
+    }
+
+#endif
 
     //  in case of negative sizing the output polygons will still be merged (on positive sizing they might
     //  overlap after size and are not necessarily merged)
diff --git a/src/db/db/dbDeepRegion.cc b/src/db/db/dbDeepRegion.cc
index 959ffe916..5d74f8dd6 100644
--- a/src/db/db/dbDeepRegion.cc
+++ b/src/db/db/dbDeepRegion.cc
@@ -1616,6 +1616,7 @@ DeepRegion::sized (coord_type d, unsigned int mode) const
     db::SizingPolygonFilter siz (pg2, d_with_mag, d_with_mag, mode);
 
     for (db::Shapes::shape_iterator si = s.begin (db::ShapeIterator::All); ! si.at_end (); ++si) {
+      pr.set_prop_id (si->prop_id ());
       db::Polygon poly;
       si->polygon (poly);
       siz.put (poly);
@@ -1678,6 +1679,7 @@ DeepRegion::sized (coord_type dx, coord_type dy, unsigned int mode) const
     db::SizingPolygonFilter siz (pg2, dx_with_mag, dy_with_mag, mode);
 
     for (db::Shapes::shape_iterator si = s.begin (db::ShapeIterator::All); ! si.at_end (); ++si) {
+      pr.set_prop_id (si->prop_id ());
       db::Polygon poly;
       si->polygon (poly);
       siz.put (poly);
diff --git a/src/db/db/dbLocalOperationUtils.h b/src/db/db/dbLocalOperationUtils.h
index 436a856bc..e18d975f8 100644
--- a/src/db/db/dbLocalOperationUtils.h
+++ b/src/db/db/dbLocalOperationUtils.h
@@ -247,6 +247,14 @@ public:
    */
   PolygonRefToShapesGenerator (db::Layout *layout, db::Shapes *shapes, db::properties_id_type prop_id = 0);
 
+  /**
+   *  @brief Sets the property ID to be used for the next polygon
+   */
+  void set_prop_id (db::properties_id_type prop_id)
+  {
+    m_prop_id = prop_id;
+  }
+
   /**
    *  @brief Implementation of the PolygonSink interface
    */
diff --git a/src/db/db/dbShapeProcessor.h b/src/db/db/dbShapeProcessor.h
index a5aa2cc4b..95f939ab0 100644
--- a/src/db/db/dbShapeProcessor.h
+++ b/src/db/db/dbShapeProcessor.h
@@ -64,6 +64,14 @@ public:
     : PolygonSink (), mp_shapes (&shapes), m_clear_shapes (clear_shapes), m_prop_id (prop_id)
   { }
 
+  /**
+   *  @brief Sets the properties ID to be used for the next polygon
+   */
+  void set_prop_id (db::properties_id_type prop_id)
+  {
+    m_prop_id = prop_id;
+  }
+
   /**
    *  @brief Implementation of the PolygonSink interface
    */
diff --git a/src/db/unit_tests/dbAsIfFlatRegionTests.cc b/src/db/unit_tests/dbAsIfFlatRegionTests.cc
index 1f1a443b1..056aabcae 100644
--- a/src/db/unit_tests/dbAsIfFlatRegionTests.cc
+++ b/src/db/unit_tests/dbAsIfFlatRegionTests.cc
@@ -1733,7 +1733,6 @@ TEST(41_EdgesWithProperties)
 
   unsigned int l1 = ly.get_layer (db::LayerProperties (1, 0));
   unsigned int l2 = ly.get_layer (db::LayerProperties (2, 0));
-  unsigned int l3 = ly.get_layer (db::LayerProperties (3, 0));  //  empty
 
   db::RecursiveShapeIterator si1 (ly, top_cell, l1);
   si1.shape_flags (db::ShapeIterator::All | db::ShapeIterator::RegardProperties);
@@ -1905,3 +1904,47 @@ TEST(43_ComplexOpsWithProperties)
   db::compare_layouts (_this, target, tl::testdata () + "/algo/flat_region_au43.gds");
 }
 
+TEST(44_SizeWithProperties)
+{
+  db::Layout ly;
+  {
+    std::string fn (tl::testdata ());
+    fn += "/algo/deep_region_42.gds";
+    tl::InputStream stream (fn);
+    db::Reader reader (stream);
+    reader.read (ly);
+  }
+
+  db::cell_index_type top_cell_index = *ly.begin_top_down ();
+  db::Cell &top_cell = ly.cell (top_cell_index);
+
+  unsigned int l1 = ly.get_layer (db::LayerProperties (1, 0));
+  unsigned int l2 = ly.get_layer (db::LayerProperties (2, 0));
+
+  db::RecursiveShapeIterator si1 (ly, top_cell, l1);
+  si1.shape_flags (db::ShapeIterator::All | db::ShapeIterator::RegardProperties);
+  db::Region r1 (si1);
+
+  db::RecursiveShapeIterator si2 (ly, top_cell, l2);
+  si2.shape_flags (db::ShapeIterator::All | db::ShapeIterator::RegardProperties);
+  db::Region r2 (si2);
+
+  db::Layout target;
+  unsigned int target_top_cell_index = target.add_cell (ly.cell_name (top_cell_index));
+
+  db::RegionCheckOptions opt;
+  opt.metrics = db::Projection;
+
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (1, 0)), r1);
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (2, 0)), r2);
+
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (10, 0)), r1.sized (200));
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (11, 0)), r1.sized (250, 50));
+
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (20, 0)), r2.sized (200));
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (21, 0)), r2.sized (250, 50));
+
+  CHECKPOINT();
+  db::compare_layouts (_this, target, tl::testdata () + "/algo/flat_region_au44.gds");
+}
+
diff --git a/src/db/unit_tests/dbDeepRegionTests.cc b/src/db/unit_tests/dbDeepRegionTests.cc
index 5b2abe509..295714c7d 100644
--- a/src/db/unit_tests/dbDeepRegionTests.cc
+++ b/src/db/unit_tests/dbDeepRegionTests.cc
@@ -2398,6 +2398,52 @@ TEST(43_ComplexOpsWithProperties)
   db::compare_layouts (_this, target, tl::testdata () + "/algo/deep_region_au43.gds");
 }
 
+TEST(44_SizeWithProperties)
+{
+  db::Layout ly;
+  {
+    std::string fn (tl::testdata ());
+    fn += "/algo/deep_region_42.gds";
+    tl::InputStream stream (fn);
+    db::Reader reader (stream);
+    reader.read (ly);
+  }
+
+  db::cell_index_type top_cell_index = *ly.begin_top_down ();
+  db::Cell &top_cell = ly.cell (top_cell_index);
+
+  db::DeepShapeStore dss;
+
+  unsigned int l1 = ly.get_layer (db::LayerProperties (1, 0));
+  unsigned int l2 = ly.get_layer (db::LayerProperties (2, 0));
+
+  db::RecursiveShapeIterator si1 (ly, top_cell, l1);
+  si1.shape_flags (db::ShapeIterator::All | db::ShapeIterator::RegardProperties);
+  db::Region r1 (si1, dss);
+
+  db::RecursiveShapeIterator si2 (ly, top_cell, l2);
+  si2.shape_flags (db::ShapeIterator::All | db::ShapeIterator::RegardProperties);
+  db::Region r2 (si2, dss);
+
+  db::Layout target;
+  unsigned int target_top_cell_index = target.add_cell (ly.cell_name (top_cell_index));
+
+  db::RegionCheckOptions opt;
+  opt.metrics = db::Projection;
+
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (1, 0)), r1);
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (2, 0)), r2);
+
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (10, 0)), r1.sized (200));
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (11, 0)), r1.sized (250, 50));
+
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (20, 0)), r2.sized (200));
+  target.insert (target_top_cell_index, target.get_layer (db::LayerProperties (21, 0)), r2.sized (250, 50));
+
+  CHECKPOINT();
+  db::compare_layouts (_this, target, tl::testdata () + "/algo/deep_region_au44.gds");
+}
+
 TEST(100_Integration)
 {
   db::Layout ly;
diff --git a/testdata/algo/deep_region_au44.gds b/testdata/algo/deep_region_au44.gds
new file mode 100644
index 000000000..7d8f7ed62
Binary files /dev/null and b/testdata/algo/deep_region_au44.gds differ
diff --git a/testdata/algo/flat_region_au44.gds b/testdata/algo/flat_region_au44.gds
new file mode 100644
index 000000000..2484aecb1
Binary files /dev/null and b/testdata/algo/flat_region_au44.gds differ