300 x 450 mm
300 x 600 mm
250 x 750 mm
300 x 300 mm
400 x 400 mm
600 x 600 mm
600 x 1200 mm
800 x 800 mm
800 x 1600 mm
1200 x 1200 mm
This may very on basis of your actual need. This is only approx calculation.
X ft
Y ft