.woocommerce .woocommerce-MyAccount-content select[name="billing_user_type"] {
    width: 100%;
    padding: 9px 12px;
    font-size: 16px;
    line-height: 1.5;
    color: #6b7c93;
    background-color: #f2f2f2;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: 4px;
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
    box-sizing: border-box;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.woocommerce .woocommerce-MyAccount-content select[name="billing_user_type"]:focus {
    border-color: #a8a8a8;
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
}