diff --git a/src/main/java/envoy/util/Bounds.java b/src/main/java/envoy/util/Bounds.java
index 3306fa9..315e047 100644
--- a/src/main/java/envoy/util/Bounds.java
+++ b/src/main/java/envoy/util/Bounds.java
@@ -8,7 +8,7 @@ import java.util.regex.Pattern;
  * Project: <strong>envoy-common</strong><br>
  * File: <strong>Bounds.java</strong><br>
  * Created: <strong>25.06.2020</strong><br>
- * 
+ *
  * @author Kai S. K. Engelbart
  * @since Envoy Common v0.1-beta
  */
@@ -18,7 +18,7 @@ public class Bounds {
 
 	/**
 	 * The regular expression against which contact names should be validated.
-	 * 
+	 *
 	 * @since Envoy Common v0.1-beta
 	 */
 	public static final Pattern CONTACT_NAME_PATTERN = Pattern.compile("^\\w[a-zA-Z0-9-]{2,15}$");
@@ -29,4 +29,12 @@ public class Bounds {
 	 * @since Envoy Common v0.1-beta
 	 */
 	public static boolean isValidContactName(String contactName) { return CONTACT_NAME_PATTERN.matcher(contactName).matches(); }
+
+	/**
+	 * @return the maximum size allowed for a user/ group name.
+	 * @apiNote has to be updated manually if {@link Bounds#CONTACT_NAME_PATTERN}
+	 *          gets updated.
+	 * @since Envoy Common v0.1-beta
+	 */
+	public static int maximumUsernameSize() { return 16; }
 }