如何在 flutter 中使我的图标图像更小

Question

I'm planning to use my custom icon instead of using material icon but some reason I cannot make the image smaller. Any idea of suggestion on how I can make the image to smaller like the material icon on the right side.

I'm applied the width and height but some reason they can't get smaller than this. (attached image)

  Widget textField() {
    return TextField(
      enabled: false,
      decoration: InputDecoration(
          contentPadding: EdgeInsets.symmetric(vertical: 10.0),
          focusedBorder: OutlineInputBorder(
            borderSide: BorderSide(color: Colors.transparent),
            borderRadius: BorderRadius.circular(10.0),
          ),
          border: OutlineInputBorder(
            borderSide: BorderSide(color: Colors.white),
            borderRadius: BorderRadius.all(
              Radius.circular(10.0),
            ),
          ),
          hintStyle: TextStyle(
              fontSize: 18, color: Theme.of(context).secondaryHeaderColor),
          hintText: 'Search',
          prefixIcon: Padding(
            padding: EdgeInsets.all(2),
            child: SizedBox(
              width: 10,
              height: 10,
              child: Image.asset(
                'assets/icons/nav-icons/Explore.png',
              ),
            ),
          ),
          suffixIcon:
              Icon(Icons.mic, color: Theme.of(context).secondaryHeaderColor),
          filled: true,
          fillColor: Theme.of(context).primaryColor),
    );
  }
  

Answer 1

Image widget has width and height property

Image.asset(
    "your/asset/path",
    width: PREFERRED_WIDTH,
    height: PREFERRED_HEIGHT,
),

Maybe you can add the prefixIconConstraints like this

 prefixIconConstraints: BoxConstraints(
     maxWidth: 20.0,
     maxHeight: 20.0,
 ),