One of the silicone sounds is 8mm. And the other is I think 12 mm. And they are about 350 mm long. Seams like almost 20 inches. But I take them all the way inside. To where I feel it slip inside my bladder. And wholly fuck you know when itโs there because it makes you feel like you in a constant orgasm ejaculation state , itโs great to jack off hard and enjoy that feeling for 5 min the let it come out and then shoot a nice load of man goo