The Jumbo certainly lives up to its' name - it's an absolutely MASSIVE realistic vibrator which will leave you feeling completely filled! For those of us who love the sensations that only the really big can bring, the Jumbo is THREE INCHES in diameter (measure it out!) and a WHOLE FOOT LONG. Use with plenty of lube for mind blowing sensations, but gentlemen - better ask the lady before you buy it for her or you might get a slap! Features a classic multi-speed "Twist and Go" controller on the base.