diff --git a/headers/os/interface/Rect.h b/headers/os/interface/Rect.h
index 9ee2bc74c0..ecb83f6a19 100644
--- a/headers/os/interface/Rect.h
+++ b/headers/os/interface/Rect.h
@@ -11,6 +11,7 @@
 
 #include <SupportDefs.h>
 #include <Point.h>
+#include <Size.h>
 
 #include <math.h>
 
@@ -26,6 +27,7 @@ class BRect {
 		BRect(const BRect &r);
 		BRect(float l, float t, float r, float b);
 		BRect(BPoint lt, BPoint rb);
+		BRect(BPoint leftTop, BSize size);
 
 		BRect	&operator=(const BRect &r);
 		void	Set(float l, float t, float r, float b);
@@ -72,12 +74,14 @@ class BRect {
 		BRect	operator&(BRect r) const;
 		BRect	operator|(BRect r) const;
 
-		bool	Intersects(BRect r) const;
 		bool	IsValid() const;
 		float	Width() const;
 		int32	IntegerWidth() const;
 		float	Height() const;
 		int32	IntegerHeight() const;
+		BSize	Size() const;
+
+		bool	Intersects(BRect r) const;
 		bool	Contains(BPoint p) const;
 		bool	Contains(BRect r) const;
 };
@@ -151,6 +155,16 @@ BRect::BRect(BPoint leftTop, BPoint rightBottom)
 }
 
 
+inline
+BRect::BRect(BPoint leftTop, BSize size)
+	: left(leftTop.x),
+	  top(leftTop.y),
+	  right(leftTop.x + size.width),
+	  bottom(leftTop.y + size.height)
+{
+}
+
+
 inline BRect &
 BRect::operator=(const BRect& from)
 {
@@ -206,4 +220,11 @@ BRect::Height() const
 	return bottom - top;
 }
 
+inline BSize
+BRect::Size() const
+{
+	return BSize(right - left, bottom - top);
+}
+
+
 #endif	// _RECT_H
diff --git a/headers/os/interface/Size.h b/headers/os/interface/Size.h
index 4558a98859..89c615fe50 100644
--- a/headers/os/interface/Size.h
+++ b/headers/os/interface/Size.h
@@ -7,7 +7,6 @@
 
 #include <limits.h>
 
-#include <Rect.h>
 #include <SupportDefs.h>
 
 
@@ -25,7 +24,6 @@ public:
 	inline						BSize();
 	inline						BSize(const BSize& other);
 	inline						BSize(float width, float height);
-	inline						BSize(const BRect& rect);
 
 	inline	float				Width() const;
 	inline	float				Height() const;
@@ -73,15 +71,6 @@ BSize::BSize(float width, float height)
 }
 
 
-// constructor
-inline
-BSize::BSize(const BRect& rect)
-	: width(rect.Width()),
-	  height(rect.Height())
-{
-}
-
-
 // Width
 inline float
 BSize::Width() const
diff --git a/src/kits/interface/CardLayout.cpp b/src/kits/interface/CardLayout.cpp
index 574665012a..778db59ef7 100644
--- a/src/kits/interface/CardLayout.cpp
+++ b/src/kits/interface/CardLayout.cpp
@@ -167,7 +167,7 @@ BCardLayout::LayoutView()
 {
 	_ValidateMinMax();
 
-	BSize size = BSize(View()->Bounds());
+	BSize size = View()->Bounds().Size();
 	size.width = max_c(size.width, fMin.width);
 	size.height = max_c(size.height, fMin.height);
 
diff --git a/src/kits/interface/SplitLayout.cpp b/src/kits/interface/SplitLayout.cpp
index d62d5d23f7..57818c265e 100644
--- a/src/kits/interface/SplitLayout.cpp
+++ b/src/kits/interface/SplitLayout.cpp
@@ -470,7 +470,7 @@ BSplitLayout::LayoutView()
 	_ValidateMinMax();
 
 	// layout the elements
-	BSize size = _SubtractInsets(BSize(View()->Bounds()));
+	BSize size = _SubtractInsets(View()->Bounds().Size());
 	fHorizontalLayouter->Layout(fHorizontalLayoutInfo, size.width);
 
 	Layouter* verticalLayouter;
@@ -562,7 +562,7 @@ BSplitLayout::StartDraggingSplitter(BPoint point)
 		return false;
 
 	// Things shouldn't be draggable, if we have a >= max layout.
-	BSize size = _SubtractInsets(BSize(View()->Frame()));
+	BSize size = _SubtractInsets(View()->Frame().Size());
 	if (fOrientation == B_HORIZONTAL && size.width >= fMax.width
 		|| fOrientation == B_VERTICAL && size.height >= fMax.height) {
 		return false;
@@ -757,7 +757,7 @@ BSplitLayout::_LayoutItem(BLayoutItem* item, BRect frame, bool visible)
 	info->max = item->MaxSize();
 
 	if (item->HasHeightForWidth()) {
-		BSize size = _SubtractInsets(BSize(View()->Frame()));
+		BSize size = _SubtractInsets(View()->Frame().Size());
 		float minHeight, maxHeight;
 		item->GetHeightForWidth(size.width, &minHeight, &maxHeight, NULL);
 		info->min.height = max_c(info->min.height, minHeight);
diff --git a/src/kits/interface/SplitLayout.h b/src/kits/interface/SplitLayout.h
index 2cfb61d3ed..17264b1f2f 100644
--- a/src/kits/interface/SplitLayout.h
+++ b/src/kits/interface/SplitLayout.h
@@ -5,7 +5,10 @@
 #ifndef	_SPLIT_LAYOUT_H
 #define	_SPLIT_LAYOUT_H
 
+
 #include <Layout.h>
+#include <Point.h>
+
 
 namespace BPrivate {
 namespace Layout {
diff --git a/src/kits/interface/TwoDimensionalLayout.cpp b/src/kits/interface/TwoDimensionalLayout.cpp
index f903d6535a..5c8c3a8958 100644
--- a/src/kits/interface/TwoDimensionalLayout.cpp
+++ b/src/kits/interface/TwoDimensionalLayout.cpp
@@ -341,7 +341,7 @@ BTwoDimensionalLayout::LayoutView()
 	_ValidateMinMax();
 
 	// layout the horizontal/vertical elements
-	BSize size = SubtractInsets(BSize(View()->Frame()));
+	BSize size = SubtractInsets(View()->Frame().Size());
 printf("BTwoDimensionalLayout::LayoutView(%p): size: (%.1f, %.1f)\n",
 View(), size.width, size.height);