diff --git a/src/KDDockWidgets.h b/src/KDDockWidgets.h
index 1185d770..155eb1a2 100644
--- a/src/KDDockWidgets.h
+++ b/src/KDDockWidgets.h
@@ -65,15 +65,6 @@ namespace KDDockWidgets
     };
     Q_DECLARE_FLAGS(RestoreOptions, RestoreOption)
 
-    ///@brief When a widget is added we need to figure out what's a decent size for it
-    ///This enum specifies the different ways to calculate it
-    enum class DefaultSizeMode {
-        ItemSize, ///< Simply uses the Item::size() of the item being added. Actual used size might be smaller if our window isn't big enough.
-        Fair, ///< Gives an equal relative size as the items that are already in the layout
-        FairButFloor, ///< Equal to fair, but if the item is smaller than the fair suggestion, then that small size is used.
-        SizePolicy, ///< Uses the item's sizeHint() and sizePolicy()
-    };
-
     enum class DropIndicatorType {
         Classic,   ///< The default
         Segmented, ///< Segmented indicators
diff --git a/src/private/DropArea.cpp b/src/private/DropArea.cpp
index 15eadd79..34615d82 100644
--- a/src/private/DropArea.cpp
+++ b/src/private/DropArea.cpp
@@ -136,9 +136,9 @@ void DropArea::addDockWidget(DockWidgetBase *dw, Location location, DockWidgetBa
     }
 
     if (option & AddingOption_StartHidden) {
-        addWidget(dw, location, relativeToFrame, DefaultSizeMode::Fair, option);
+        addWidget(dw, location, relativeToFrame, Layouting::Item::DefaultSizeMode::Fair, option);
     } else {
-        addWidget(frame, location, relativeToFrame, DefaultSizeMode::Fair, option);
+        addWidget(frame, location, relativeToFrame, Layouting::Item::DefaultSizeMode::Fair, option);
     }
 
     if (hadSingleFloatingFrame && !hasSingleFloatingFrame()) {
@@ -319,13 +319,14 @@ bool DropArea::drop(QWidgetOrQuick *droppedWindow, KDDockWidgets::Location locat
 
         auto frame = Config::self().frameworkWidgetFactory()->createFrame();
         frame->addWidget(dock);
-        addWidget(frame, location, relativeTo, DefaultSizeMode::FairButFloor);
+        addWidget(frame, location, relativeTo, Layouting::Item::DefaultSizeMode::FairButFloor);
     } else if (auto floatingWindow = qobject_cast<FloatingWindow *>(droppedWindow)) {
         if (!validateAffinity(floatingWindow))
             return false;
 
         const bool hadSingleFloatingFrame = hasSingleFloatingFrame();
-        addMultiSplitter(floatingWindow->dropArea(), location, relativeTo, DefaultSizeMode::FairButFloor);
+        addMultiSplitter(floatingWindow->dropArea(), location, relativeTo,
+                         Layouting::Item::DefaultSizeMode::FairButFloor);
         if (hadSingleFloatingFrame != hasSingleFloatingFrame())
             updateFloatingActions();
 
diff --git a/src/private/MultiSplitter.cpp b/src/private/MultiSplitter.cpp
index 8472d455..95bc0ec4 100644
--- a/src/private/MultiSplitter.cpp
+++ b/src/private/MultiSplitter.cpp
@@ -160,8 +160,9 @@ bool MultiSplitter::validateInputs(QWidgetOrQuick *widget,
 }
 
 void MultiSplitter::addWidget(QWidgetOrQuick *w, Location location,
-                                    Frame *relativeToWidget, DefaultSizeMode defaultSizeMode,
-                                    AddingOption option)
+                              Frame *relativeToWidget,
+                              Layouting::Item::DefaultSizeMode defaultSizeMode,
+                              AddingOption option)
 {
     auto frame = qobject_cast<Frame*>(w);
     qCDebug(addwidget) << Q_FUNC_INFO << w
@@ -226,7 +227,8 @@ void MultiSplitter::addWidget(QWidgetOrQuick *w, Location location,
 }
 
 void MultiSplitter::addMultiSplitter(MultiSplitter *sourceMultiSplitter, Location location,
-                                     Frame *relativeTo, DefaultSizeMode defaultSizeMode)
+                                     Frame *relativeTo,
+                                     Layouting::Item::DefaultSizeMode defaultSizeMode)
 {
     qCDebug(addwidget) << Q_FUNC_INFO << sourceMultiSplitter << location << relativeTo;
     addWidget(sourceMultiSplitter, location, relativeTo, defaultSizeMode);
diff --git a/src/private/MultiSplitter_p.h b/src/private/MultiSplitter_p.h
index ebcea600..302e659b 100644
--- a/src/private/MultiSplitter_p.h
+++ b/src/private/MultiSplitter_p.h
@@ -69,7 +69,9 @@ public:
      * @brief Adds a widget to this MultiSplitter.
      */
     void addWidget(QWidgetOrQuick *widget, KDDockWidgets::Location location,
-                   Frame *relativeTo = nullptr, DefaultSizeMode = DefaultSizeMode::Fair, AddingOption option = {});
+                   Frame *relativeTo = nullptr,
+                   Layouting::Item::DefaultSizeMode = Layouting::Item::DefaultSizeMode::Fair,
+                   AddingOption option = {});
 
     /**
      * Adds an entire MultiSplitter into this layout. The donor MultiSplitter will be deleted
@@ -78,7 +80,8 @@ public:
      * of widgetBar when the whole splitter is dropped into this one.
      */
     void addMultiSplitter(MultiSplitter *splitter, KDDockWidgets::Location location,
-                          Frame *relativeTo = nullptr, DefaultSizeMode = DefaultSizeMode::Fair);
+                          Frame *relativeTo = nullptr,
+                          Layouting::Item::DefaultSizeMode = Layouting::Item::DefaultSizeMode::Fair);
 
     /**
      * @brief Removes an item from this MultiSplitter.