img.badge-gray {
  filter: gray; /* IE6-9 */
  -webkit-filter: grayscale(1); /* Google Chrome, Safari 6+ & Opera 15+ */
  filter: grayscale(1); /* Microsoft Edge and Firefox 35+ */
}

img.badge-extra-small {
	height:24px;
}

img.badge-small {
	height:36px;
}

img.badge-medium {
	height:48px;
}

img.badge-large {
	height:64px;
}