The length of the threading lines depends on your required outcome for your brows. if you would like simply a tidy up, short and fast lines would be used, pulling out only a few hairs at a time. but if you would like a full thread, long bursts would be used, following the direction of the shape, usually one line on the top of the brow and one down the side to make sure a point at the end. By pulling out a line of hair in one go, it ensures an extremely straight and precise form.When getting your brows threaded, it is very important to stretch, to make sure that no skin is caught in between the items of thread. Your technician can ask you to put one hand over your eyelid and one hand on your forehead.