Our most popular sizes for extra large wall pictures are 30"x40" and 40"x60" but we can print much smaller or larger upon request. The rule of thumb in interior design is for a print to take up between 25% to 50% of blank wall space, however, as with all things related to design and taste, this isn't an absolute and is up to your own taste.
Most printers consider anything over thirty-six inches as a “large format.” Large format prints are reprints of digital photographs, graphics, or art that need to be printed on specialty wide format printers.
The best image file to used to blow-up an image is a flattened (no layers) TIF file that has Adobe RGB98 color matching and 600 DPI. That said, other common file types will work (JPG, PSD, PDF, etc.) with DPI between 150 and 300.
Vinyl is waterproof, fade resistant, versatile, and can be used indoor or outdoor, so compared to other large format mediums it provides the most value.