.select2 {
    width: 100% !important;
}

.has-error .select2-selection, .has-error .select2-container,
.has-error .select2-choice, .has-error .select2-choices {
    border-color: #ab1717;
    box-shadow: none;
}

    .has-error .select2-selection:focus, .has-error .select2-container:focus,
    .has-error .select2-choice:focus, .has-error .select2-choices:focus {
        border-color: #ab1717;
        box-shadow: none;
    }