If you need more accuracy than PdfViewer.PageWidth/PageHeight you can use:
// Get precise page sizes in PDF points (One point is 1/72 inch or around 0.3528 mm)
ww := ImageEnView1.PdfViewer.CurrentPage.Width;
hh := ImageEnView1.PdfViewer.CurrentPage.Height;
Nigel
Xequte Software
www.imageen.com