Open the PDF in a PDF editor
Look for page size, crop, or resize settings
Choose the desired page dimensions
Apply the changes to all pages or selected pages
Save the resized PDF as a new file
Use an online PDF resize tool if you do not have editing software
Print the PDF to a new paper size and save as PDF if needed
Use Adobe Acrobat, Preview, or another PDF app with page scaling options
Check the resized PDF to confirm the layout and quality