| most sheets are 2400 x 1200 x 16
you can get other sizes like 1800 x 900 .
a sheet of white is around $50 for 2400 x 1200 x 16
A sheet of black the same size is around $90-$100 in HMR ......
DO NOT go to bunnings.. try to find a local ply and wood place . | 
