What is thickness of Birch Plywood in India?

Some popular birch plywood formats are :

Birch Plywood, Birch Film Faced Plywood, Size: 8”x 4” Feet, Thickness: 12mm , 15mm, 16mm,  18mm.

Birch Plywood, Birch Film Faced Plywood, Size: 5”x 10” Feet, Thickness: 12mm , 15mm, 16mm,  18mm.