layout_width="wrap_content" has no effect to button

Question

Hello

In platform xamarin android

<Button
        android:id="@+id/size"
        android:tag="size"
        android:text="@string/buttonsize"
        android:fontFamily="calibri"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="1dp"
        android:layout_marginTop="4dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:textAllCaps="false"
        android:background="@drawable/buttonbackreturn"
        android:textColor="#ffeff0f0"
        android:textStyle="bold"
        android:textSize="18sp"
        
        />
   
    <Button

If i reduce the textsixe the width of the button remains the same

Thanks