need some help on resolution please

[signs]

Hi all

i have to print some wallpaper for a customer . the artwork they have sent is 7 Meg the picture is of woodland .

The area of the print is approx 2.2m x 5m

I did a sample print and the artwork is very pixelated , the customer assures me it is the same artwork that other offices in different countries have used !

i have seen pictures of the other offices and they do look crisp

i'm pretty sure a 7 meg image is never going to look good at 2.2 m x 5m

any idea of the resolution the artwork should be please

the artwork original size is 250mm high at 300dpi

 

[signs]

i've sorted it i think , seems when the image is blown up to full size i'm getting 34dpi , not good enough

 

[signs]

yeah it was never going to happen with the image size they gave us , waiting for new artwork now