Firefly's trainer kit provides an enjoyable way to expand your sexual limits. Made of odorless tpe, the plugs have strong suction-cups and can be used with all lubricants. Product dimensions: mini: 3.2 X 1.7 X 1.7 Sm: 4 x 1.7 X 1.7 Med: 5 x 2.1 X 2.1