There are there man sizes for prints small, medium and large within these sizes the exact aspect ratios may vary
Furthermore there are three types of materials that can be printed on. Cardstock being the cheapest, followed by Art Paper and Canvas.
Heavy weight card with a slight gloss. Not your ordinary printer paper
Heavy weight, heavy tooth paper that absorbs ink well for strong shadows. Similar to high absorption water colour paper
High quality Rolled Canvas
All Prices have shipping and tax factored in. All orders ship from Toronto, prices are in US dollars