diff --git a/app/views/form/_radio_question.html.erb b/app/views/form/_radio_question.html.erb
index 9e553b13a..0a6b38417 100644
--- a/app/views/form/_radio_question.html.erb
+++ b/app/views/form/_radio_question.html.erb
@@ -1,6 +1,7 @@
<%= f.govuk_radio_buttons_fieldset question_key,
legend: { text: question["header"], size: "l" },
- hint: { text: question["hint_text"] } do %>
+ hint: { text: question["hint_text"] },
+ small: (question["answer_options"].size > 5) do %>
<% question["answer_options"].map do |key, val| %>
<% if key.starts_with?("divider") %>