diff --git a/src/backoffice/templates/backoffice/sos_create_edit.html b/src/backoffice/templates/backoffice/sos_create_edit.html
index ffaf7806ea2f0f62b801233a9b5a498d70f29d87..2267fd37e14bf5e633f032c839862a9d230a0f08 100644
--- a/src/backoffice/templates/backoffice/sos_create_edit.html
+++ b/src/backoffice/templates/backoffice/sos_create_edit.html
@@ -181,6 +181,7 @@
                         {% if form.room.value|ensure_uuid == r.id %}selected aria-selected="true"{% endif %}>
                   {{ r.name }}
                   {% if r.assembly_id != event.assembly_id %}<span class="text-muted">({{ r.assembly.slug }})</span>{% endif %}
+                  {% if r.capacity %}<span class="text-muted">[{{ r.capacity }} seats]</span>{% endif %}
                 </option>
               {% endfor %}
             </select>