diff --git a/src/db/db/gsiDeclDbPolygon.cc b/src/db/db/gsiDeclDbPolygon.cc
index b1573b595..4f84f11cf 100644
--- a/src/db/db/gsiDeclDbPolygon.cc
+++ b/src/db/db/gsiDeclDbPolygon.cc
@@ -965,9 +965,9 @@ struct polygon_defs
     poly->size (d, d, mode);
   }
 
-  static void size_d (C *poly, coord_type d)
+  static void size_dvm (C *poly, const db::Vector &dv, unsigned int mode)
   {
-    poly->size (d, d, 2);
+    poly->size (dv.x (), dv.y (), mode);
   }
 
   static C sized_xy (const C *poly, coord_type dx, coord_type dy, unsigned int mode)
@@ -980,9 +980,9 @@ struct polygon_defs
     return poly->sized (d, d, mode);
   }
 
-  static C sized_d (const C *poly, coord_type d)
+  static C sized_dvm (const C *poly, const db::Vector &dv, unsigned int mode)
   {
-    return poly->sized (d, d, 2);
+    return poly->sized (dv.x (), dv.y (), mode);
   }
 
   static bool inside (const C *poly, point_type pt)
@@ -1272,7 +1272,19 @@ struct polygon_defs
       "result = ep.simple_merge_p2p([ poly ], false, false, 1)\n"
       "@/code\n"
     ) +
-    method_ext ("size", &size_dm, gsi::arg ("d"), gsi::arg ("mode"),
+    method_ext ("size", &size_dvm, gsi::arg ("dv"), gsi::arg ("mode", (unsigned int) 2),
+      "@brief Sizes the polygon (biasing)\n"
+      "\n"
+      "This method is equivalent to\n"
+      "@code\n"
+      "size(dv.x, dv.y, mode)\n"
+      "@/code\n"
+      "\n"
+      "See \\size for a detailed description.\n"
+      "\n"
+      "This version has been introduced in version 0.28.\n"
+    ) +
+    method_ext ("size", &size_dm, gsi::arg ("d"), gsi::arg ("mode", (unsigned int) 2),
       "@brief Sizes the polygon (biasing)\n"
       "\n"
       "Shifts the contour outwards (d>0) or inwards (d<0).\n"
@@ -1294,7 +1306,19 @@ struct polygon_defs
       "\n"
       "This method has been introduced in version 0.23.\n"
     ) +
-    method_ext ("sized", &sized_dm, gsi::arg ("d"), gsi::arg ("mode"),
+    method_ext ("sized", &sized_dvm, gsi::arg ("dv"), gsi::arg ("mode", (unsigned int) 2),
+      "@brief Sizes the polygon (biasing) without modifying self\n"
+      "\n"
+      "This method is equivalent to\n"
+      "@code\n"
+      "sized(dv.x, dv.y, mode)\n"
+      "@/code\n"
+      "\n"
+      "See \\size and \\sized for a detailed description.\n"
+      "\n"
+      "This version has been introduced in version 0.28.\n"
+    ) +
+    method_ext ("sized", &sized_dm, gsi::arg ("d"), gsi::arg ("mode", (unsigned int) 2),
       "@brief Sizes the polygon (biasing) without modifying self\n"
       "\n"
       "Shifts the contour outwards (d>0) or inwards (d<0).\n"
@@ -1305,28 +1329,6 @@ struct polygon_defs
       "\n"
       "See \\size and \\sized for a detailed description.\n"
     ) +
-    method_ext ("sized", &sized_d, gsi::arg ("d"),
-      "@brief Sizes the polygon (biasing)\n"
-      "\n"
-      "@brief Sizing (biasing) without modifying self\n"
-      "This method is equivalent to\n"
-      "@code\n"
-      "sized(d, d, 2)\n"
-      "@/code\n"
-      "\n"
-      "See \\size and \\sized for a detailed description.\n"
-    ) +
-    method_ext ("size", &size_d, gsi::arg ("d"),
-      "@brief Sizes the polygon (biasing)\n"
-      "\n"
-      "Shifts the contour outwards (d>0) or inwards (d<0).\n"
-      "This method is equivalent to\n"
-      "@code\n"
-      "size(d, d, 2)\n"
-      "@/code\n"
-      "\n"
-      "See \\size for a detailed description.\n"
-    ) +
     method ("holes", &C::holes,
       "@brief Returns the number of holes"
     ) +
diff --git a/src/db/db/gsiDeclDbRegion.cc b/src/db/db/gsiDeclDbRegion.cc
index 2c78f30f4..0cc777b8b 100644
--- a/src/db/db/gsiDeclDbRegion.cc
+++ b/src/db/db/gsiDeclDbRegion.cc
@@ -471,17 +471,6 @@ static void break_polygons (db::Region *r, size_t max_vertex_count, double max_a
   r->process (db::PolygonBreaker (max_vertex_count, max_area_ratio));
 }
 
-static db::Region &size_ext (db::Region *r, db::Coord d)
-{
-  r->size (d);
-  return *r;
-}
-
-static db::Region sized_ext (db::Region *r, db::Coord d)
-{
-  return r->sized (d);
-}
-
 static db::Region &merge_ext1 (db::Region *r, int min_wc)
 {
   r->merge (false, std::max (0, min_wc - 1));
@@ -740,6 +729,19 @@ fill_region_multi (const db::Region *fr, db::Cell *cell, db::cell_index_type fil
   db::fill_region_repeat (cell, *fr, fill_cell_index, fc_box, row_step, column_step, fill_margin, remaining_polygons, glue_box);
 }
 
+static db::Region
+sized_dvm (const db::Region *region, const db::Vector &dv, unsigned int mode)
+{
+  return region->sized (dv.x (), dv.y (), mode);
+}
+
+static db::Region &
+size_dvm (db::Region *region, const db::Vector &dv, unsigned int mode)
+{
+  region->size (dv.x (), dv.y (), mode);
+  return *region;
+}
+
 static db::Point default_origin;
 
 //  provided by gsiDeclDbPolygon.cc:
@@ -1537,7 +1539,18 @@ Class<db::Region> decl_Region (decl_dbShapeCollection, "db", "Region",
     "# r now is (50,-50;50,100;100,100;100,-50)\n"
     "@/code\n"
   ) + 
-  method ("size", (db::Region & (db::Region::*) (db::Coord, unsigned int)) &db::Region::size, gsi::arg ("d"), gsi::arg ("mode"),
+  method_ext ("size", &size_dvm, gsi::arg ("dv"), gsi::arg ("mode", (unsigned int) 2),
+    "@brief Anisotropic sizing (biasing)\n"
+    "\n"
+    "@return The region after the sizing has applied (self)\n"
+    "\n"
+    "This method is equivalent to \"size(dv.x, dv.y, mode)\".\n"
+    "\n"
+    "Merged semantics applies for this method (see \\merged_semantics= for a description of this concept)\n"
+    "\n"
+    "This variant has been introduced in version 0.28."
+  ) +
+  method ("size", (db::Region & (db::Region::*) (db::Coord, unsigned int)) &db::Region::size, gsi::arg ("d"), gsi::arg ("mode", (unsigned int) 2),
     "@brief Isotropic sizing (biasing)\n"
     "\n"
     "@return The region after the sizing has applied (self)\n"
@@ -1546,39 +1559,34 @@ Class<db::Region> decl_Region (decl_dbShapeCollection, "db", "Region",
     "\n"
     "Merged semantics applies for this method (see \\merged_semantics= for a description of this concept)\n"
   ) + 
-  method_ext ("size", size_ext, gsi::arg ("d"),
-    "@brief Isotropic sizing (biasing)\n"
-    "\n"
-    "@return The region after the sizing has applied (self)\n"
-    "\n"
-    "This method is equivalent to \"size(d, d, 2)\".\n"
-    "\n"
-    "Merged semantics applies for this method (see \\merged_semantics= for a description of this concept)\n"
-  ) + 
   method ("sized", (db::Region (db::Region::*) (db::Coord, db::Coord, unsigned int) const) &db::Region::sized, gsi::arg ("dx"), gsi::arg ("dy"), gsi::arg ("mode"),
     "@brief Returns the anisotropically sized region\n"
     "\n"
     "@return The sized region\n"
     "\n"
-    "This method is returns the sized region (see \\size), but does not modify self.\n"
+    "This method returns the sized region (see \\size), but does not modify self.\n"
     "\n"
     "Merged semantics applies for this method (see \\merged_semantics= for a description of this concept)\n"
   ) + 
-  method ("sized", (db::Region (db::Region::*) (db::Coord, unsigned int) const) &db::Region::sized, gsi::arg ("d"), gsi::arg ("mode"),
+  method_ext ("sized", &sized_dvm, gsi::arg ("dv"), gsi::arg ("mode", (unsigned int) 2),
+    "@brief Returns the (an)isotropically sized region\n"
+    "\n"
+    "@return The sized region\n"
+    "\n"
+    "This method is equivalent to \"sized(dv.x, dv.y, mode)\".\n"
+    "This method returns the sized region (see \\size), but does not modify self.\n"
+    "\n"
+    "Merged semantics applies for this method (see \\merged_semantics= for a description of this concept)\n"
+    "\n"
+    "This variant has been introduced in version 0.28."
+  ) +
+  method ("sized", (db::Region (db::Region::*) (db::Coord, unsigned int) const) &db::Region::sized, gsi::arg ("d"), gsi::arg ("mode", (unsigned int) 2),
     "@brief Returns the isotropically sized region\n"
     "\n"
     "@return The sized region\n"
     "\n"
-    "This method is returns the sized region (see \\size), but does not modify self.\n"
-    "\n"
-    "Merged semantics applies for this method (see \\merged_semantics= for a description of this concept)\n"
-  ) + 
-  method_ext ("sized", sized_ext, gsi::arg ("d"),
-    "@brief Isotropic sizing (biasing)\n"
-    "\n"
-    "@return The region after the sizing has applied (self)\n"
-    "\n"
-    "This method is equivalent to \"sized(d, d, 2)\".\n"
+    "This method is equivalent to \"sized(d, d, mode)\".\n"
+    "This method returns the sized region (see \\size), but does not modify self.\n"
     "\n"
     "Merged semantics applies for this method (see \\merged_semantics= for a description of this concept)\n"
   ) + 
diff --git a/testdata/ruby/dbPolygonTest.rb b/testdata/ruby/dbPolygonTest.rb
index ac2d7c037..3f30f0cf4 100644
--- a/testdata/ruby/dbPolygonTest.rb
+++ b/testdata/ruby/dbPolygonTest.rb
@@ -277,8 +277,19 @@ class DBPolygon_TestClass < TestBase
     a = RBA::Polygon::new( [ RBA::Point::new( 0, 1 ), RBA::Point::new( 1, 5 ), RBA::Point::new( 5, 5 ) ] )
     assert_equal( a.to_s, "(0,1;1,5;5,5)" )
     assert_equal( a.sized(2, 0, 2).to_s, "(-2,1;-1,5;7,5;2,1)" )
+    assert_equal( a.sized(RBA::Vector::new(2, 0), 2).to_s, "(-2,1;-1,5;7,5;2,1)" )
+    assert_equal( a.sized(RBA::Vector::new(2, 0)).to_s, "(-2,1;-1,5;7,5;2,1)" )
+    aa = a.dup
     a.size(2, 0, 2);
     assert_equal( a.to_s, "(-2,1;-1,5;7,5;2,1)" )
+    a = aa
+    aa = a.dup
+    a.size(RBA::Vector::new(2, 0), 2);
+    assert_equal( a.to_s, "(-2,1;-1,5;7,5;2,1)" )
+    a = aa
+    aa = a.dup
+    a.size(RBA::Vector::new(2, 0));
+    assert_equal( a.to_s, "(-2,1;-1,5;7,5;2,1)" )
 
     a = RBA::Polygon::new
     assert_equal( a.to_s, "()" )
diff --git a/testdata/ruby/dbRegionTest.rb b/testdata/ruby/dbRegionTest.rb
index 47b5808eb..be086fd1c 100644
--- a/testdata/ruby/dbRegionTest.rb
+++ b/testdata/ruby/dbRegionTest.rb
@@ -318,6 +318,16 @@ class DBRegion_TestClass < TestBase
     rr.size(10, 20, 2)
     assert_equal(rr.to_s, "(-20,-40;-20,180;0,180;0,220;110,220;110,0;90,0;90,-40)")
 
+    assert_equal((r1 | r2).sized(RBA::Vector::new(10, 20)).to_s, "(-20,-40;-20,180;0,180;0,220;110,220;110,0;90,0;90,-40)")
+    rr = (r1 | r2).dup
+    rr.size(10, 20, 2)
+    assert_equal(rr.to_s, "(-20,-40;-20,180;0,180;0,220;110,220;110,0;90,0;90,-40)")
+
+    assert_equal((r1 | r2).sized(RBA::Vector::new(10, 20), 2).to_s, "(-20,-40;-20,180;0,180;0,220;110,220;110,0;90,0;90,-40)")
+    rr = (r1 | r2).dup
+    rr.size(10, 20, 2)
+    assert_equal(rr.to_s, "(-20,-40;-20,180;0,180;0,220;110,220;110,0;90,0;90,-40)")
+
     r1.merged_semantics = false
 
     assert_equal((r1 | r2).sized(10, 2).to_s, "(-20,-30;-20,170;0,170;0,210;110,210;110,10;90,10;90,-30)")