div {
  margin: 10px;
  border: 1px solid #ccc;
}
.icon0 {
  width: 256px;
  height: 256px;
  background: url(../images/0.png?__tom) no-repeat;
  background-size: 256px 256px;
}
.icon1 {
  width: 256px;
  height: 256px;
  color: #ccc;
  background: url(../images/1.png?__tom) no-repeat;
  background-size: 256px 256px;
}
.icon2 {
  width: 100px;
  height: 100px;
  color: #ccc;
  background: url(../images/2.png?__tom) no-repeat;
  background-size: 100px 100px;
}
.icon7 {
  width: 200px;
  height: 200px;
  background: url(../images/7.png?__jerry) no-repeat;
  background-size: 200px 200px;
}