In a project of mine I wrap Text instances around Containers. This particular code sample features two stacked Text objects.
Here's a code sample.
//80% of screen width
double c_width = MediaQuery.of(context).size.width*0.8;
return new Container (
padding: const EdgeInsets.all(16.0),
width: c_width,
child: new Column (
children: [
new Text ("Long text 1 Long text 1 Long text 1 Long text 1 Long text 1 Long text 1 Long text 1 Long text 1 Long text 1 Long text 1 Long text 1 Long text 1 Long text 1 Long text 1 ", textAlign: TextAlign.left),
new Text ("Long Text 2, Long Text 2, Long Text 2, Long Text 2, Long Text 2, Long Text 2, Long Text 2, Long Text 2, Long Text 2, Long Text 2, Long Text 2", textAlign: TextAlign.left),
],
),
);
[edit] Added a width constraint to the container