如何打印A4尺寸的多页？

Finance ppl want to print all invoices in one go. what happen is header of one invoice go to footer of upper invoice or footer of invoice goes to next invoice. so all they are mixing up.

I tried few things as using page tag with css page[size="A4"] but nothing fruitful yet :(

<style>
page[size="A4"] {
  background: white;
  width: 21cm;
  height: 29.7cm;
  display: block;
  margin: 0 auto;
  margin-bottom: 0.5cm;

}
@media print {
  page[size="A4"] {
    margin: 0;
    box-shadow: 0;
        width: 21cm;
  height: 29.7cm;
  }
}
</style>

HTML

<page size="A4"> INVOICE DATA which comes more or less than A4 size </page>

How to collapse each invoice data within same A4 page?? please help Thank you