Printing on 4x6 index card

How do I get an excel spreadsheet (invoice) to print on a 4x6 index card? So
far when I have printed it, it fits but the font is really small. When I have
tried to make the font bigger it cuts off the words. Any suggestions? Thanks
in advance!!!

Depending on your version of Excel you may be able to specify a custom
paper size. If you can't specify, then click >File >Page Setup and
select A6 type paper. That's not an exact match, but pretty close.
Then set printing to 1 page wide by 1 page high. This will get you
pretty close to where you want to go.