why do they measure the cigar ring size in american measuring? im pretty sure every one else uses metric. it would be a lot easyer to measure cigar ring size in mm. i assumed it was measured in mm by the circumference, not the diameter. that would be more accurate. it would be easyer to measure the square shape cigars because theres a difference in diameter if you measure corner to corner and side to side. are they measured in metric in other countries and they just convert the size rating for marketing in america?