.error_taglia_gen {
    display: none;
}
.quickbuy-size {
    background-color: #fff;
    width: auto;
    min-width: 35px;
    height: 35px;
    padding: 7px 5px;
    margin: 1px;
    cursor: pointer;
    font-size: 14px;
    text-align: center;
    display: inline-block;
    transition: background-color .5s linear;
    -moz-transition: background-color .5s linear;
    -o-transition: background-color .5s linear;
    -webkit-transition: background-color .5s linear;
}
.current, .quickbuy-size:hover {
    background-color: #000;
    color: #fff;
}