NEO-STRETCH ballstretchers fit and feel amazing. The same shape as old-style neoprene ballstretchers, same thickness, but made of our super-soft, stretchy silicone. It won't strangle your sack, wears longer for more stretch, more play… <br /><br />NEO-STRETCH keeps those nuts down in their sack. All all three styles have a fat lip around the edge so this one will not dig into your sack. Unlike neoprene, NEO-STRETCH is rubbery, stretchy and feels like its part of your sack… <br /><br />NEO-STRETCH SHORT fits any sack, even high-and-tights. <br /><br />Safe with all lubes, this toy will not pinch or cause the burning feel some get using neoprene on their sack. And no possibility of allergy because this is 100% silicone… <br /><br />NEO SHORT is a 1.25-inch, shorter ballstretcher that will fit any sack. Can be stacked as you grow. <br /><br />All are a little under 1 inch inside diameter, with a slight swell in the center to squeeze you more where you need it most.