.ni {
    position: relative;
    z-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
    display: inline-block;
    font-style: normal;
    font-variant: normal;
    text-rendering: auto;
    line-height: 1;
    width: 100%;
    height: 100%; 
}

.iconpicker-item .ni {
    width: 20px;
    height: 20px;
    margin: -3px 0 0 -3px;    
}

.input-group-addon .ni {
    width: 14px;
    height: 14px;    
}