How big is 12mm in inches? Leave a Comment / GeneralGreatest ReplyIt is 0.47 inches bigExtra SolutionsHow big is 14 mm in a circle?Read More: What tims is 9pm PST in Central time? How many linear ft in 1 acre? Related posts:How many 8 oz in 2 liters? What is sbad treas 310 Misc pay? What is 135 divided by 9? What times 15 equals 100? How tall is 61 inches in feet? READ: How would you describe the polarity of CF2Cl2?