.webform-scale-options input + label {
    text-align: center;
    color: #666;
    border: 3px solid #ccc;
    border-radius: 50%;
    background-color: #fff;
    margin: 0;
}

.webform-scale-options .form-item {
    display: inline-block;
    margin: 0 4px;
    text-align: center;
    color: #666;
    border: 3px solid #ccc;
    border-radius: 50%;
    background-color: #fff;
    margin: 0;
}