Starting with the smoothly rounded tip, this probe slides in so nice and easy! A total insertable length of 3.5" provides for perfect sensations all along the flexible shaft. Great for a beginner, new to penis play and sounds, as well as comfortable for longer wear! These sounds were primarily designed for men, but have been adopted by the ladies, especially in this shorter version. If sounds are to be used by women, the softer, more pliable materials work very well in this small (8mm) diameter.