.emojione {
    font-size: inherit;
    height: 2ex;
    width: 2.1ex;
    min-height: 18px;
    min-width: 18px;
    display: inline-block;
    margin: -.2ex .15em .2ex;
    line-height: normal;
    vertical-align: middle;
}

img.emojione {
    width: auto
}