Dr Laura Berman Dilators are a set of 4 interlocking dilators which are plastic, plus an additional silicone sleeve, the smallest size also has a base which can be used as a handle.
Please note that the smallest dilator is larger than other sets and may be more difficult for women who struggle with tampon use.
 
The sizes are:
 
Base dilator - 9cm x 2cm 
Small attachment - 11.5cm x 2.5cm
Medium attachment - 14cm x 3.25cm
Large attachment - 16.5cm x 3.75cm