Some vibrators try to sell you on the idea that size doesn't matter. After all, if vibration's the thing, who cares about the size of the chassis? Lelo's Iris, however, is not one of those vibrators. With a business end that's 5.5" long and 5" around--with a big white handle to boot--the Iris is no shrinking violet: to put it technically, it's pretty fucking big.
To give you a sense of its size, here's a photo of your humble vibe tester, along with both the Iris (on the left) and its little sister, the Gigi:
Yeah. The Iris does not fuck around.
But how much does that really matter? Does a bigger boat actually effect the motion of the ocean? Well, yes and no. The Iris certainly feels more intense than the Gigi, so if slim vibes leave you cold the Iris is definitely for you. But at the end of the day, the vibe's the thing--and I was far more impressed by the Iris's powerful motor and fancy pulse patterns, which were intense enough to elicit an "Oh fuck!" from even this jaded reviewer.
There's also the matter of the petal-like protusions all along the body of the Iris. I suspect that these are intended to stimulate the g-spot and other girly bits, but they didn't seem to make much of a difference sensationwise. They sure are pretty, though!
On a more technical side, the Iris is rechargeable, made of silicone, and has the same intuitive controls as the Gigi. In other words, it's an all around winner ... just bigger.