I would contact the printer and ask them what size they would like the files delivered. A file that size still can result in issues if you are trying to deliver it at a 1:1 scale. I would ask the printer on their desired scale and at the rip to the digital printer they will modify it to a 1:1. Another thing to be aware of, you could run into computer issues when trying to work in a 1:1 scale at that size. Just setting up the file in CC-2014, at a 1:1 with nothing in it, saved out, results in a
I would also advise, if you are unaware, to convert all fonts to outline for various reasons. Some printers dont own the font and will expect you to provide them or charge you for getting them.
When you talk to the printer I would also find out what they want in color setup and if they need you to convert a Pantone to CMYK or if they even have the Pantone you are looking for if you are going with a Pantone color.