How to Change image size in animated Container flutter

Im trying to change the size of the image, i try to change the container size but not working. How do i change the size of my image?

the Scale on decorationImage is not affect the size of my image

InkWell(
      onTap: () {
        setState(() {
          _selectedItemIndex = 0;
        });
      },
      child: AnimatedContainer(
        height: 0 == _selectedItemIndex ? 85 : 70,
        width: 0 == _selectedItemIndex
            ? MediaQuery.of(context).size.width / 6 + 10
            : MediaQuery.of(context).size.width / 6 - 2.5,
        duration: const Duration(seconds: 0),
        curve: Curves.easeIn,
        child: Material(
          color: 0 == _selectedItemIndex ? Colors.blue : Grey,
          child: Container(
            decoration: BoxDecoration(
              image: DecorationImage(
                alignment: Alignment(0, -0.45),
                scale: 10,
                image: AssetImage('assets/images/home.png'),
              ),
              color: Colors.transparent,
              borderRadius: BorderRadius.all(Radius.circular(25)),
            ),
            child: Container(
              alignment: Alignment(0, 1),
              child: Text(
                "home",
                style: TextStyle(
                  fontWeight: FontWeight.bold,
                ),
              ),
            ),
          ),
        ),
      ),
    ),