3 Sizes for Gradual Anal Training. Smooth Shaft for Easy Insertion. Firm Yet Flexible. Curved Base for Comfort Between the Cheeks. Phthalate-Free, Body-Safe. Insertable Length: 2.75 in. (7cm) Insertable Length: 3.25 in. (8.3 cm) Insertable Length: 4.25 in. (10.8 cm)