10 Feb Triangle with CSS

.your-item:before {
    border-color: #ccc transparent transparent;
    border-style: solid;
    border-width: 10px;
    content: "";
    display: inline-block;
    height: 0;
    margin: 10px 0 0 10px;
    transform: rotate(0);
    transform-origin: 50% 25%;
    transition: .25s ease-in-out;
    width: 0;
    vertical-align: middle;
}