Select2 apply bootstrap input-lg

$(document).ready(function () {
	$('select').select2();
});

.select2-container--default .select2-selection--single {
    height: 46px !important;
    padding: 10px 16px;
    font-size: 18px;
    line-height: 1.33;
    border-radius: 6px;
}
.select2-container--default .select2-selection--single .select2-selection__arrow b {
    top: 85% !important;
}
.select2-container--default .select2-selection--single .select2-selection__rendered {
    line-height: 26px !important;
}
.select2-container--default .select2-selection--single {
    border: 1px solid #CCC !important;
    box-shadow: 0px 1px 1px rgba(0, 0, 0, 0.075) inset;
    transition: border-color 0.15s ease-in-out 0s, box-shadow 0.15s ease-in-out 0s;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.0/js/select2.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" />
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.0/css/select2.css" />
<div class="col-sm-4">
    <label for="mobile" class="control-label"><span class="text-danger">*</span> Nationality</label>
    <input type="text" id="nationality" name="nationality" class="form-control input-lg" />
</div>
<div class="col-sm-4 padding-minimum">
    <label for="mobile" class="control-label"><span class="text-danger">*</span> Gender</label>
    <select name="gender" id="gender" class="form-control select2-container step2-select" data-placeholder="Select Gender">
        <option></option>
        <option value="1">Male</option>
        <option value="0">Female</option>
    </select>
</div>