CSS code:
.no1 {
    display: inline-block;
    width: 48px;
    height: 48px;
	margin: 0 3px 3px 0;
    background-image: url(http://icons.iconarchive.com/icons/custom-icon-design/pretty-office-11/48/number-1-icon.png);
    background-repeat: no-repeat;
	float: left;
}

HTML di post:
<span class="no1"></span>