(1) These gags are hand-dipped in silicon rubber four times to achieve their smooth, seamless surface. There are no openings on the ends of the balls, so they can be shared by multiple people and disinfected easily. The ball smoothly extends out into 2” extensions each side that are securely riveted onto a sturdy leather strap with lockable buckles.(2) The diameter of the ball is 1.6”. When buckled, the straps provide a minimum circumference of 17”. At the maximum size, the circumference is 22”.(3) The weight of this item is approximately 130g.