The smallest photo size we can scan is 63.5mm x 50mm (2.5in x 2in). The largest photo size we can scan is 215mm x 863mm (8.5in x 34in).
Individual passport photos are usually too small to fit through our scanner.
Most photos in your collection are probably either 6x4s, 7x5s or polaroids. These will all be fine. Any larger photos up to A4 size are all OK too!