... size ,we call them : one is Metric T-Grid System ,another is British T-Grid System ; For the Metric T-Grids System is widely used in India ,UAE, ... African Countries,and some other countries ; For the British T-Grid System is widely used in Tai Wan Region,Bangladesh,Malaysia,The ... board size is 594mm*594mm,595mm*595mm,596mm*596mm ,595mm*1195mm,like this ; For the British T-Grids System,the size ...