This little vibe was bought as an afterthought because the price was super low and I needed to fill out my basket for same-day delivery.I call it an exception because, if you've bought low price vibrator on Amazon, you know that they don't work well or at all. This one has been a champ from the start.So, as to it's size, well, I'm a size-queen, and so far I've used it mostly inside a silicone sleeve to add a bit of length and girth. Vibes are strong enough to feel through the sleeve though that's on full speed.The dial selector at the base has what seems to be three speed/ vibration intensities... Off, low, and full blast.Battery life is pretty amazing, I've gotten 2+ hours of continuous use from a set of NiMH AAs and 3+ from Lithium batteries.Overall, a really good vibrator, a little slim for my needs, but at this price point, give it a shot.