I think snapmad 30cm×20cm prints are excellent value at 90p - I've got a few of these framed around the house and they look great. Largest size snapmad do is 114cm×76cm (45in×30in) for £14.39 (though the original photo may not have enough pixels to justify that size); most expensive is 60cm×50cm (24in×20in) on block canvas for £20.