.mf-icon-20 {
    width: 20px;
    min-width: 20px;
    height: 20px;
    margin-top: auto;
    margin-bottom: auto;
}

.mf-icon-16 {
    width: 16px;
    min-width: 16px;
    height: 16px;
    margin-top: auto;
    margin-bottom: 4px;
}