diff --git a/packages/flame/lib/src/components/input/button_component.dart b/packages/flame/lib/src/components/input/button_component.dart
index 3e96c15b5c8..81bf1930eca 100644
--- a/packages/flame/lib/src/components/input/button_component.dart
+++ b/packages/flame/lib/src/components/input/button_component.dart
@@ -45,6 +45,9 @@ class ButtonComponent extends PositionComponent with TapCallbacks {
       button != null,
       'The button has to either be passed in as an argument or set in onLoad',
     );
+    if (size.isZero()) {
+      size = button!.size;
+    }
     if (!contains(button!)) {
       add(button!);
     }
diff --git a/packages/flame/lib/src/components/input/sprite_button_component.dart b/packages/flame/lib/src/components/input/sprite_button_component.dart
index 721497c3b9c..97eba006f00 100644
--- a/packages/flame/lib/src/components/input/sprite_button_component.dart
+++ b/packages/flame/lib/src/components/input/sprite_button_component.dart
@@ -65,6 +65,9 @@ class SpriteButtonComponent extends SpriteGroupComponent<ButtonState>
       _button != null,
       'The button sprite has to be set either in onLoad or in the constructor',
     );
+    if (size.isZero()) {
+      size = _button!.originalSize;
+    }
     sprites = {
       ButtonState.up: _button!,
       ButtonState.down: buttonDown,