Soldier on and complete your training! With this anal training kit you can stretch your ambitions as far as you want. Start small and gradually work your way up until you have conquered the largest plug. Are you ready for the long haul? The smallest plug has an insertable length of 2.8 inches and a diameter of 0.8 inches ast the widest point. The medium plug has an insertable length of 3.5 inches and a maximum diameter of 1.2 inches. The largest plug has an insertable length of 4.7 inches and a maximum diameter of 1.6 inches.