good response 'team', but as Dominic only requires A4 size prints, i dont think he'll have any problem with jpegs and I think his printer or printing company should cope.

Dominic actually said A1 which is getting close to 2 x 3 foot photos, and as just mentioned, if the Raw files are available from his chosen photos, the converting to a TIFF would be preferable. For a high quality print of this sort of size, I think you're looking at a file size of some 70 megs. The print lab should be able to upsize the photos to the size they want and the resolution level as well.

I also thought A1 was the required size. Rock on Dom! & good luck with your project.

Allow me Sue!!