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 inch x 1.7 inch x 1.7 inch 
Sm: 4 inch x 1.7 inch x 1.7 inch 
Med: 5 inch x 2.1 inch x 2.1 inch