diff --git a/lib.css b/lib.css
index 39f4e51..95d92d5 100644
--- a/lib.css
+++ b/lib.css
@@ -56,6 +56,15 @@ See the LICENCE file in the repository root for full licence text.
 .brad-10 {
   border-radius: 10px;
 }
+.brad-15 {
+  border-radius: 15px;
+}
+.brad-20 {
+  border-radius: 20px;
+}
+.brad-30 {
+  border-radius: 30px;
+}
 .brad-half {
   border-radius: 50%;
 }