We do two sizes really well and that's 18'x24' and 24'x36' prints for USA, Canada, Australia and New Zealand. And 50cm x70cm or 70cm x 100cm for rest of world.
We can now offer all size options in Australia.
18'x24' & 24'x36
50cm x70cm & 70cmx100cm
We have no plans to introduce smaller sizes in the future.
For the larger size costs for your country email us at firstname.lastname@example.org. Then send us your order number and request for larger size and we will manually issue a larger print and send you a payment link for size upgrade.
Hope this helps!