diff --git a/vcl/CustomTarget_qt5_moc.mk b/vcl/CustomTarget_qt5_moc.mk
index e49928e78ef5..da238cd1f99b 100644
--- a/vcl/CustomTarget_qt5_moc.mk
+++ b/vcl/CustomTarget_qt5_moc.mk
@@ -51,6 +51,7 @@ $(call gb_CustomTarget_get_target,vcl/qt5) : \
 	$(gb_CustomTarget_workdir)/vcl/qt5/QtInstanceScale.moc \
 	$(gb_CustomTarget_workdir)/vcl/qt5/QtInstanceScrollbar.moc \
 	$(gb_CustomTarget_workdir)/vcl/qt5/QtInstanceScrolledWindow.moc \
+	$(gb_CustomTarget_workdir)/vcl/qt5/QtInstanceSizeGroup.moc \
 	$(gb_CustomTarget_workdir)/vcl/qt5/QtInstanceSpinButton.moc \
 	$(gb_CustomTarget_workdir)/vcl/qt5/QtInstanceSpinner.moc \
 	$(gb_CustomTarget_workdir)/vcl/qt5/QtInstanceTextView.moc \
diff --git a/vcl/CustomTarget_qt6_moc.mk b/vcl/CustomTarget_qt6_moc.mk
index 6b839f1ef5e4..763958dbc252 100644
--- a/vcl/CustomTarget_qt6_moc.mk
+++ b/vcl/CustomTarget_qt6_moc.mk
@@ -51,6 +51,7 @@ $(call gb_CustomTarget_get_target,vcl/qt6) : \
 	$(gb_CustomTarget_workdir)/vcl/qt6/QtInstanceScale.moc \
 	$(gb_CustomTarget_workdir)/vcl/qt6/QtInstanceScrollbar.moc \
 	$(gb_CustomTarget_workdir)/vcl/qt6/QtInstanceScrolledWindow.moc \
+	$(gb_CustomTarget_workdir)/vcl/qt6/QtInstanceSizeGroup.moc \
 	$(gb_CustomTarget_workdir)/vcl/qt6/QtInstanceSpinButton.moc \
 	$(gb_CustomTarget_workdir)/vcl/qt6/QtInstanceSpinner.moc \
 	$(gb_CustomTarget_workdir)/vcl/qt6/QtInstanceTextView.moc \
diff --git a/vcl/Library_vclplug_qt5.mk b/vcl/Library_vclplug_qt5.mk
index 17cacb5c5151..f48553c48aea 100644
--- a/vcl/Library_vclplug_qt5.mk
+++ b/vcl/Library_vclplug_qt5.mk
@@ -133,6 +133,7 @@ $(eval $(call gb_Library_add_exception_objects,vclplug_qt5,\
     vcl/qt5/QtInstanceScale \
     vcl/qt5/QtInstanceScrollbar \
     vcl/qt5/QtInstanceScrolledWindow \
+    vcl/qt5/QtInstanceSizeGroup \
     vcl/qt5/QtInstanceSpinButton \
     vcl/qt5/QtInstanceSpinner \
     vcl/qt5/QtInstanceTextView \
diff --git a/vcl/Library_vclplug_qt6.mk b/vcl/Library_vclplug_qt6.mk
index 585c7fdf06b8..c46a4997d1c1 100644
--- a/vcl/Library_vclplug_qt6.mk
+++ b/vcl/Library_vclplug_qt6.mk
@@ -133,6 +133,7 @@ $(eval $(call gb_Library_add_exception_objects,vclplug_qt6,\
     vcl/qt6/QtInstanceScale \
     vcl/qt6/QtInstanceScrollbar \
     vcl/qt6/QtInstanceScrolledWindow \
+    vcl/qt6/QtInstanceSizeGroup \
     vcl/qt6/QtInstanceSpinButton \
     vcl/qt6/QtInstanceSpinner \
     vcl/qt6/QtInstanceTextView \
diff --git a/vcl/inc/qt5/QtInstanceSizeGroup.hxx b/vcl/inc/qt5/QtInstanceSizeGroup.hxx
new file mode 100644
index 000000000000..87f7f88cf12b
--- /dev/null
+++ b/vcl/inc/qt5/QtInstanceSizeGroup.hxx
@@ -0,0 +1,28 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vcl/weld/SizeGroup.hxx>
+
+#include <QtCore/QObject>
+
+class QtInstanceSizeGroup : public QObject, public virtual weld::SizeGroup
+{
+    Q_OBJECT
+
+public:
+    QtInstanceSizeGroup(VclSizeGroupMode eMode);
+
+    virtual void add_widget(weld::Widget* pWidget) override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/vcl/inc/qt6/QtInstanceSizeGroup.hxx b/vcl/inc/qt6/QtInstanceSizeGroup.hxx
new file mode 100644
index 000000000000..9bab7605f54c
--- /dev/null
+++ b/vcl/inc/qt6/QtInstanceSizeGroup.hxx
@@ -0,0 +1,12 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include "../qt5/QtInstanceSizeGroup.hxx"
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/vcl/qt5/QtInstanceBuilder.cxx b/vcl/qt5/QtInstanceBuilder.cxx
index b5deab0408ad..39a70635c726 100644
--- a/vcl/qt5/QtInstanceBuilder.cxx
+++ b/vcl/qt5/QtInstanceBuilder.cxx
@@ -39,6 +39,7 @@
 #include <QtInstanceScale.hxx>
 #include <QtInstanceScrollbar.hxx>
 #include <QtInstanceScrolledWindow.hxx>
+#include <QtInstanceSizeGroup.hxx>
 #include <QtInstanceSpinButton.hxx>
 #include <QtInstanceSpinner.hxx>
 #include <QtInstanceTextView.hxx>
@@ -962,10 +963,9 @@ std::unique_ptr<weld::Scrollbar> QtInstanceBuilder::weld_scrollbar(const OUStrin
     return xRet;
 }
 
-std::unique_ptr<weld::SizeGroup> QtInstanceBuilder::create_size_group(VclSizeGroupMode)
+std::unique_ptr<weld::SizeGroup> QtInstanceBuilder::create_size_group(VclSizeGroupMode eMode)
 {
-    assert(false && "Not implemented yet");
-    return nullptr;
+    return std::make_unique<QtInstanceSizeGroup>(eMode);
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/vcl/qt5/QtInstanceSizeGroup.cxx b/vcl/qt5/QtInstanceSizeGroup.cxx
new file mode 100644
index 000000000000..d335404d3572
--- /dev/null
+++ b/vcl/qt5/QtInstanceSizeGroup.cxx
@@ -0,0 +1,28 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/config.h>
+
+#include <QtInstanceSizeGroup.hxx>
+#include <QtInstanceSizeGroup.moc>
+
+#include <sal/log.hxx>
+
+QtInstanceSizeGroup::QtInstanceSizeGroup(VclSizeGroupMode eMode)
+{
+    if (eMode != VclSizeGroupMode::NONE)
+        SAL_WARN("vcl.qt", "QtInstanceSizeGroup logic not implemented yet");
+}
+
+void QtInstanceSizeGroup::add_widget(weld::Widget*)
+{
+    SAL_WARN("vcl.qt", "QtInstanceSizeGroup logic not implemented yet");
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/vcl/qt6/QtInstanceSizeGroup.cxx b/vcl/qt6/QtInstanceSizeGroup.cxx
new file mode 100644
index 000000000000..61d4bf94eacd
--- /dev/null
+++ b/vcl/qt6/QtInstanceSizeGroup.cxx
@@ -0,0 +1,12 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include "../qt5/QtInstanceSizeGroup.cxx"
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */