Change the page size of a rdlc report dynamically

Question

Hello all,

I have a problem regarding rdlc reports. I need 3 different reports whose contents are exactly same, they differ only in page size. I want to make only one rdlc report for it. Then will take input from the user that which size he/she wants to print and will generate the report accordingly.

              Please let me know Is this possible or I need to make 3 different rdlc reports? This is very urgent, plz reply ASAP.
        
Thanx in advance.