My text is overflowing Pixels, how can I fix that and how do I increase the size of image-CodePudding

I have tried using Expanded and Flexible and none of it is working.I am not able to understand why.Also is this the best way to increase the size of image, because I want that my images looks size looks same across all devices.

Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Container(
                    width: size.width * 0.4,
                    height: size.width * 0.6,
                    decoration: BoxDecoration(
                        image: DecorationImage(
                            image: AssetImage('images/brushOne.jpg'),
                            fit: BoxFit.fill)),
                  ),
                  Padding(
                    padding: const EdgeInsets.only(top: 40.0),
                    child: Text(
                      'Thank you for letting me do what I love, your support is contagious If I could put all 10,000 of you in a room and give you all a hug I WOULD. Your support makes my heart grow and glow. Thank you for helping me create a business and a family.I love you all