circular indicator gets whole page flutter

1   @override
2    Widget build(BuildContext context) {
3      return Container(
4        child: Center(
5          child: Column(
6            crossAxisAlignment: CrossAxisAlignment.center,
7            children: <Widget>[
8              SizedBox(
9                child: CircularProgressIndicator(),
10                height: 200.0,
11                width: 200.0,
12              ),
13              SizedBox(
14                child: CircularProgressIndicator(),
15                height: 50.0,
16                width: 50.0,
17              ),
18              SizedBox(
19                child: CircularProgressIndicator(),
20                height: 10.0,
21                width: 10.0,
22              )
23            ],
24          ),
25        ),
26      );
27