Slightly curved but not tapered, these will suck any size nips and are deep enough and big enough for small to medium piercings. The Oxballs Elong changes the direction of a suction cup with a curved chamber. Its firmer Hnkyjunk TPR body has a broad, flared base, giving the long upper section a wide contact area. Turning the cup changes the way the curve faces rather than changing to another shape. 

Width 1.25 - 1.5 inch 
Height 2 inch 
Depth 1 inch 
Inner circumference 2.5 inch