@media not all, not all
{
.replace-2x {
	font-size: 1px;
}
.example {
	background-image: url("../images/example2x.png"); background-size: 13px 13px; -webkit-background-size: 13px 13px; -moz-background-size: 13px 13px; -o-background-size: 13px 13px;
}
}