Hi Neelima,
Thank you for using Syncfusion products,
We can get the bounds of the drawn text as follow.
PdfFont font = new PdfTrueTypeFont(new Font("arial", 12));
PdfTextElement element = new PdfTextElement("Hi Hellow World", font);
// Set the properties for the text element.
element.Brush = new PdfSolidBrush(Color.Black);
// Set the layout format properties to make the text flow through multiple pages.
PdfLayoutFormat layoutFormat = new PdfLayoutFormat();
layoutFormat.Break = PdfLayoutBreakType.FitPage;
layoutFormat.Layout = PdfLayoutType.Paginate;
// Set the bounds.
RectangleF bounds = new RectangleF(PointF.Empty, page.Graphics.ClientSize);
// Draw the text element.
PdfTextLayoutResult result= element.Draw(page, bounds, layoutFormat)
Here "result" gives the bounds of the text.
Please follow the below link for more information about the PdfTextElement.
Please let us know if you have any concern,
With Regards,
Praveen