Example CSS rules using Glue

.sprite-source-foo, .sprite-source-bar, .sprite-source-baz {
  background-image:url('source.png');
  background-repeat:no-repeat;
}

.sprite-source-foo {
  background-position: 0 0;
  width: 25px;
  height: 25px;
}

.sprite-source-bar {
  background-position: 0 -25px;
  width: 35px;
  height: 15px;
}

.sprite-source-baz:hover {
  background-position: -37px -12px;
  width: 12px;
  height: 12px;
}

.sprite-source-baz {
  background-position: -25px -12px;
  width: 12px;
  height: 12px;
}