Question: how thick is 2 ply?
Answer: The most common thickness used is 4 ply (around 1/16th of an inch). You can tell the difference in thickness by saying 2 ply is 1/2 the thickness (1/32") of 4 ply. 6 ply (1/8") is 4+2 ply, so it would be 1 1/2 times as thick. 8 ply (1/4") would be 4+4, or 2 times as thick.