Printing on A5 sheet

Printing on A5 sheet

Hello Team. I am looking for options to reduce the hard printing size of the invoice. I would like to bring down the size to A5 paper ( 5.8 x 8.3 in). 

I see that the new template for Invoice only provides a default size of A4 & Letter. Do let me know for any ways to reduce the paper size for printing purposes. 

Regards,
Amit Mehra