Table of standard sizes - (inches) (mm)
PSM	12X12	(304 X 304)	16X16	(406 X 406)	18X18	(457 X 457)	24X24	(609 X 609)
	24X30	(609 X 762)	24X36	(609 X 914)	36X36	(914 X 914)