3 smooth cone shaped graduated sizes to build up to when training. Body contouring curved handles for all day wearability.Comfort fit tapered base with slim neck .Cone shaped head provides a satifying fullness sensation. Dimensions: Small: (Overall length: 4.25"; Diameter at widest: 4"), Medium: (Overall Length: 4.75"; Diameter at widest: 4.5"), Large: (Overall Length: 5.75"; Diameter at widest: 5.25")