diff --git a/index.html b/index.html
index 3f48d74..b1a67f6 100644
--- a/index.html
+++ b/index.html
@@ -1674,7 +1674,7 @@ <h1>Batch Card Printer</h1>
                     batch_cards.push(printer_card.outerHTML);
                 }
                 var a = window.open('', '', 'height=500, width=500');
-                a.document.write('<html><body>'+batch_cards.join('<div style="break-after:page"></div>')+'</body></html>');
+                a.document.write('<html><head><style>@page{size: A4 landscape};</style></head><body>'+batch_cards.join('<div style="break-after:page"></div>')+'</body></html>');
                 a.document.close();
                 a.print();
             }
@@ -1719,7 +1719,7 @@ <h1>Batch Card Printer</h1>
                     batch_cards.push(printer_card.outerHTML);
                 }
                 var a = window.open('', '', 'height=500, width=500');
-                a.document.write('<html><body>'+batch_cards.join('<div style="break-after:page"></div>')+'</body></html>');
+                a.document.write('<html><head><style>@page{size: A4 landscape;}</style></head><body>'+batch_cards.join('<div style="break-after:page"></div>')+'</body></html>');
                 a.document.close();
                 a.print();
             }
