diff --git a/styleguide.css b/styleguide.css
index 87a8c48..0ed8529 100644
--- a/styleguide.css
+++ b/styleguide.css
@@ -1794,6 +1794,13 @@ section + section {
     max-width: none;
     height: var(--layout-object-card-mobile-height);
   }
+
+  .sg-object-card[data-pattern="object-group-card"] {
+    flex-basis: 100%;
+    width: 100%;
+    min-width: 0;
+    max-width: none;
+  }
 }
 
 .sg-object-card__content {