insert this code
.select2-selection__rendered {
line-height: 35px !important;
}
.select2-container .select2-selection--single {
height: 37px !important;
width: 100% !important;
}
.select2-selection__arrow {
height: 37px !important;
}




It's did nothing. My Select2 picker remains the same height. Doesn't match Bootstrap theme at all.