This Review Title is Doesn't fit (most) dryers and the content is: I bought it specifically because so many people were saying it fit their dryers that were my brands. Unfortunately I got it, took it out of the box to look at it, didn't realize my husband threw away the box when I wasn't paying attention, and by the time I got it into the bathroom a day or two later and check if it fit with my blow dryers I didn't have the box to return it. I have three completely different hair dryers, you would think it would've fit at least one? Nope, it didn't fit any of my three blow dryers. I have a vidal sassoon, conair, and a Revlon. Again, they are all different and different sizes too. It did not fit any of them!! I offered it to my friend, I said just bring your dryer over tho to test it first. Hers (different than all mine) didn't fit either!! I walked it over to three different neighbors and None of theirs fit!!! I am so curious how this is fitting so many other people's? Is there an attachment needed? I am very dissapointed as it was not cheap. So now I'm out the money plus I still need a diffuser and this thing is rather large and taking up space in my drawer because I don't like throwing away anything new. Be careful when buying it, apparently it doesn't fit many dryers at all..There are other information for this review, one is This reviewer did purchase it and the other is 7 people think this review is helpful.