diff --git a/packages/flutter/lib/src/widgets/_platform_selectable_region_context_menu_web.dart b/packages/flutter/lib/src/widgets/_platform_selectable_region_context_menu_web.dart
index c4fa712ac19..0f261aa21ae 100644
--- a/packages/flutter/lib/src/widgets/_platform_selectable_region_context_menu_web.dart
+++ b/packages/flutter/lib/src/widgets/_platform_selectable_region_context_menu_web.dart
@@ -135,7 +135,6 @@ class PlatformSelectableRegionContextMenu extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Stack(
-      alignment: Alignment.center,
       children: <Widget>[
         const Positioned.fill(
           child: HtmlElementView(
diff --git a/packages/flutter/test/widgets/selectable_region_test.dart b/packages/flutter/test/widgets/selectable_region_test.dart
index c1710f8dd36..051cfda9545 100644
--- a/packages/flutter/test/widgets/selectable_region_test.dart
+++ b/packages/flutter/test/widgets/selectable_region_test.dart
@@ -3594,6 +3594,27 @@ void main() {
     skip: kIsWeb, // [intended] Web uses its native context menu.
   );
 
+  // Regression test for https://github.com/flutter/flutter/issues/121053.
+  testWidgets('Ensure SelectionArea does not affect the layout of its children', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const MaterialApp(
+        home: Column(
+          crossAxisAlignment: CrossAxisAlignment.stretch,
+          children: <Widget>[
+              SelectionArea(child: Text('row 1')),
+              Text('row 2'),
+            ],
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+    final double xOffset1 = tester.getTopLeft(find.text('row 1')).dx;
+    final double xOffset2 = tester.getTopLeft(find.text('row 2')).dx;
+    expect(xOffset1, xOffset2);
+  },
+    variant: TargetPlatformVariant.all(),
+  );
+
   testWidgets('the selection behavior when clicking `Copy` item in mobile platforms', (WidgetTester tester) async {
     List<ContextMenuButtonItem> buttonItems = <ContextMenuButtonItem>[];
     final FocusNode focusNode = FocusNode();