diff --git a/app/assets/stylesheets/common/foundation/base.scss b/app/assets/stylesheets/common/foundation/base.scss
index 3a1db2ed88..03fa374c22 100644
--- a/app/assets/stylesheets/common/foundation/base.scss
+++ b/app/assets/stylesheets/common/foundation/base.scss
@@ -121,3 +121,8 @@ tr {
     animation: background-fade-highlight 2.5s ease-out;
   }
 }
+
+// https://en.wikipedia.org/wiki/Ruby_character
+ruby > rt {
+  font-size: 72%; // ~10px with 14px base
+}