.ch-grid {
    margin: 20px 0 0 0;
    padding: 0;
    list-style: none;
    display: block;
    text-align: center;
    width: 100%;
}

.ch-grid:after,
.ch-item:before {
	content: '';
    display: table;
}

.ch-grid:after {
	clear: both;
}

.ch-grid li {
    width: 220px;
    height: 220px;
    display: inline-block;
    margin: 45px;
}