public class CustomPDFDocumentPageSizePDF { public static void main(String[] args) {
Rectangle pageSize = new Rectangle(216, 720);
Document document = new Document(pageSize);
try {
PdfWriter.getInstance(document, new FileOutputStream("CustomPDFDocumentPageSizePDF.pdf"));
document.open();
document.add(new Paragraph("The size of this page is 216x720 points."));
document.add(new Paragraph("216pt / 72 points per inch = 3 inch"));
document.add(new Paragraph("720pt / 72 points per inch = 10 inch"));
document.add(new Paragraph("The size of this page is 3x10 inch."));
document.add(new Paragraph("3 inch x 2.54 = 7.62 cm"));
document.add(new Paragraph("10 inch x 2.54 = 25.4 cm"));
document.add(new Paragraph("The size of this page is 7.62x25.4 cm."));