diff --git a/js/apps/admin-ui/src/components/realm-selector/realm-selector.css b/js/apps/admin-ui/src/components/realm-selector/realm-selector.css
index 900a698dd2a..deb2da0778a 100644
--- a/js/apps/admin-ui/src/components/realm-selector/realm-selector.css
+++ b/js/apps/admin-ui/src/components/realm-selector/realm-selector.css
@@ -18,6 +18,16 @@
   width: 100%;
 }
 
+.keycloak__realm_selector__dropdown .pf-c-dropdown__menu {
+  min-width: 0;
+  width: 15.125rem;
+
+}
+.keycloak__realm_selector__dropdown .pf-c-dropdown__menu .pf-m-fill {
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
 .pf-c-context-selector.keycloak__realm_selector__context_selector {
   --pf-c-context-selector__toggle--Color: var(--pf-c-nav__link--m-current--Color);
 }