I bought this on a whim, and it's partially my fault for not checking the dimensions. I was sold on the "contains the tip and part way down the shaft". I'm almost 7.5" when big, it contains the tip and barely an inch of my shaft. It's not an overly comfortable fit, but it does the job. The vibration patterns are terrific, and if you combine it with some sort of prostate vibrator, your orgasms can be *fantastic*. With a cock ring, this on my penis and a vibrator in my ass, I can easily cum hands free. If you're more than 4 to 5", I would probably look elsewhere. Otherwise, for the price, you can't go wrong.