For the bag length measure from where on the pole you want the snuffer to sit. On the snu on my tiger I moved iy up 6 inches in front of the bridle. Makes snuffing easier if you start to round up. Then measure back to the end of the pole . Thats the bag length. Or you can hold your arm in a small circle and pull the spin through with the snuffer line attached. Like your arm was the mouth and find out how long you need.