In order to identify the height alignment with a standard-sized pedestrian that best estimates the whole body trajectories by scaling those of a pedestrian in a different size, car-to-pedestrian collision simulations were conducted using five production car models in the small sedan category, human FE models in three sizes and five aligned points with the standard-sized pedestrian. The trajectories from the simulations were scaled using the distance between the aligned point and the measurement point of the trajectory. The results showed that aligning with the knee-joint height provided the best estimation of the trajectories in the small sedan category.