In this study, Ar gas-puff z-pinch plasma is produced by an inductive pulsed power system. Gap length dependency of the z-pinch plasma characteristics such as a pinching plasma behavior, soft x-ray emissions, spatial distribution of hot spots is investigated. The soft x-ray output is increased with the gap length and hot spots generated by the sausage instability is distributed along the z-axis in case of shorter delay time of the discharge onset. However, hot spots are distributed in the center of the gap space with the increase of the delay time in any gap length and the number of hot spots is decreased.