Dental General 2d263a8f Slot size commonly used in orthodontics is: A 0.017 x 0.021 B 0.014 x 0.024 C 0.018 x 0.025 D 0.010 x 0.020 High-Yield Explanation The most commonly used slot size is 0.022*0.028 inch followed by 0.018*0.025 inch slot.