This REALROCK CRYSTAL CLEAR model has been designed with realistic balls for an enhanced lifelike experience. All come with a sturdy suction cup so you can stick it to practically any smooth surface. All are body-safe and non-porous which makes them easy-to-clean and gives them a longer lasting durability. 
This model with balls stands 21 cm (8.3") tall including the suction cup, has an insertable length of 16 cm (6.3") and has a girth of 4 cm (1.6").