fixed select2 height with text-sm

build/scss/plugins/_select2.scss

@@ -213,6 +213,42 @@
   }
 }
 
+// text-sm override
+.text-sm {
+  .select2-container--default {
+    .select2-selection--single {
+      height: $input-height-sm;
+      
+      .select2-selection__rendered {
+        margin-top: -.4rem;
+      }
+
+      .select2-selection__arrow {
+        top: -.12rem;
+      }
+    }
+
+    .select2-selection--multiple {
+      min-height: $input-height-sm;
+      
+      .select2-selection__rendered {
+        padding: 0 $input-padding-x-sm / 2 $input-padding-y-sm;
+        margin-top: -($input-padding-x-sm / 5);
+
+        li:first-child.select2-search.select2-search--inline {
+          margin-left: $input-padding-x-sm / 2;
+        }
+
+        .select2-search.select2-search--inline {
+          .select2-search__field {
+            margin-top: 6px;
+          }
+        }
+      }
+    }
+  }
+}
+
 // Background colors (theme colors)
 @each $name, $color in $theme-colors {
   @include select2-variant($name, $color);

dist/css/adminlte.css

@@ -20547,6 +20547,35 @@ html.maximized-card {
   box-shadow: none;
 }
 
+.text-sm .select2-container--default .select2-selection--single {
+  height: calc(1.8125rem + 2px);
+}
+
+.text-sm .select2-container--default .select2-selection--single .select2-selection__rendered {
+  margin-top: -.4rem;
+}
+
+.text-sm .select2-container--default .select2-selection--single .select2-selection__arrow {
+  top: -.12rem;
+}
+
+.text-sm .select2-container--default .select2-selection--multiple {
+  min-height: calc(1.8125rem + 2px);
+}
+
+.text-sm .select2-container--default .select2-selection--multiple .select2-selection__rendered {
+  padding: 0 0.25rem 0.25rem;
+  margin-top: -0.1rem;
+}
+
+.text-sm .select2-container--default .select2-selection--multiple .select2-selection__rendered li:first-child.select2-search.select2-search--inline {
+  margin-left: 0.25rem;
+}
+
+.text-sm .select2-container--default .select2-selection--multiple .select2-selection__rendered .select2-search.select2-search--inline .select2-search__field {
+  margin-top: 6px;
+}
+
 .select2-primary + .select2-container--default.select2-container--open .select2-selection--single {
   border-color: #80bdff;
 }