.icon{
    display: inline-block;
    width: 18px;
    height: 18px;
    margin-left: 2px;
    margin-right: 2px;
}

.icon-nav{
    display: inline-block;
    width: 25px;
    height: 25px;
    margin-left: 2px;
    margin-right: 2px;
}

.icon-file-preview{
    width: 300px;
    max-height: 300px;
    border-radius: 5%;
    border: 1px solid #ddd;
    background: #fff;
    padding: 2px;
    margin: 0 auto;
    display: block;
}

.icon-bill{
    height: 30px;
    width: 60px;
}

.icon-bill-sq{
    height: 30px;
    width: 30px;
}

.icon-bill-lg{
    height: 30px;
    width: 90px;
}