average thickness of paper
- For LENGTH, no more than 11Â½ or less than 5 inches long. 3. For THICKNESS, no more than 0.25, or less thanâ¦ a. 0.007 inch thick if no more than 4Â¼ inches high and 6 inches long; or b. 0.009 inch thick if more than 4Â¼ inches high or 6 inches long, or both.