If you have considered anal play, but were too timid to try because of inexperience, then the Tantus Ripple Small Butt Plug would be the perfect solution. Its graduated design starts out at a diameter that's smaller than a finger tip, then it gradually increases in size to a maximum diameter of only 2.5cm, providing you complete control of insertion. The maximum insertable length is 12.6cm.
Maximum diameter: 2.5 cm
Insertable length: 12.6 cm