.zippers-length-opt__standard table {
    width: 100%;
    border-collapse: collapse;
    /*margin: 20px 0;*/
}
.zippers-length-opt__standard th, .zippers-length-opt__standard  td {
    border: 1px solid black;
    padding: 8px;
    text-align: center;
}
.zippers-length-opt__standard  th {
    /*background-color: #f2f2f2;*/
}