diff --git a/Libraries/LibGUI/Widget.cpp b/Libraries/LibGUI/Widget.cpp
index 5c8f72c9ff..fba0fb25fa 100644
--- a/Libraries/LibGUI/Widget.cpp
+++ b/Libraries/LibGUI/Widget.cpp
@@ -145,6 +145,10 @@ Widget::Widget()
     REGISTER_INT_PROPERTY("min_height", min_height, set_min_height);
     REGISTER_INT_PROPERTY("max_height", max_height, set_max_height);
 
+    REGISTER_INT_PROPERTY("fixed_width", dummy_fixed_width, set_fixed_width);
+    REGISTER_INT_PROPERTY("fixed_height", dummy_fixed_height, set_fixed_height);
+    REGISTER_SIZE_PROPERTY("fixed_size", dummy_fixed_size, set_fixed_size);
+
     register_property(
         "focus_policy", [this]() -> JsonValue {
         auto policy = focus_policy();
diff --git a/Libraries/LibGUI/Widget.h b/Libraries/LibGUI/Widget.h
index 987f8d1d49..d8c0abc0f9 100644
--- a/Libraries/LibGUI/Widget.h
+++ b/Libraries/LibGUI/Widget.h
@@ -138,6 +138,26 @@ public:
     void set_max_width(int width) { set_max_size(width, max_height()); }
     void set_max_height(int height) { set_max_size(max_width(), height); }
 
+    void set_fixed_size(const Gfx::IntSize& size)
+    {
+        set_min_size(size);
+        set_max_size(size);
+    }
+
+    void set_fixed_size(int width, int height) { set_fixed_size({ width, height }); }
+
+    void set_fixed_width(int width)
+    {
+        set_min_width(width);
+        set_max_width(width);
+    }
+
+    void set_fixed_height(int height)
+    {
+        set_min_height(height);
+        set_max_height(height);
+    }
+
     Gfx::IntSize preferred_size() const { return m_preferred_size; }
     void set_preferred_size(const Gfx::IntSize&);
     void set_preferred_size(int width, int height) { set_preferred_size({ width, height }); }
@@ -369,6 +389,11 @@ private:
 
     bool load_from_json(const JsonObject&);
 
+    // HACK: These are used as property getters for the fixed_* size property aliases.
+    int dummy_fixed_width() { return 0; }
+    int dummy_fixed_height() { return 0; }
+    Gfx::IntSize dummy_fixed_size() { return {}; }
+
     Window* m_window { nullptr };
     RefPtr<Layout> m_layout;