I just want to leave a full code removing the default margin to make it clear
Card(
margin: EdgeInsets.zero,
clipBehavior: Clip.antiAlias,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8.0),
),
elevation: 4,
child: Image.network(
model.item.image,
width: 20,
height: 200,
alignment: Alignment.center,
fit: BoxFit.cover,
),