diff --git a/templates/booking/_participant_card.html.twig b/templates/booking/_participant_card.html.twig
index 09f3d4e..c18a166 100644
--- a/templates/booking/_participant_card.html.twig
+++ b/templates/booking/_participant_card.html.twig
@@ -17,7 +17,12 @@
 
 <div class="py-4" id="participant-card-{{ index }}">
     <div class="flex items-start space-x-4">
-        <div class="{{ html_classes('w-12 h-12 inline-flex flex-shrink-0 items-center justify-center rounded-full text-white text-2xl font-bold', { 'bg-primary-dark': not showAsError, 'bg-red-500': showAsError }) }}">
+        <div class="{{ html_classes('w-12 h-12 inline-flex flex-shrink-0 items-center justify-center rounded-full text-white font-bold', {
+            'bg-primary-dark': not showAsError,
+            'bg-red-500': showAsError,
+            'text-2xl': participantNumber < 100,
+            'text-xl': participantNumber >= 100,
+        }) }}">
             {{ participantNumber }}
         </div>
         <div class="flex-1 leading-5">