Largest on the market, that I could find.
Good extra large diffuser. I like the size since I can bunch a lot of hair into this. (Of course this is a downfall if you travel a lot and have to pack this into a suitcase) The fingers are a good length. They don't extend much further than the sides of the diffuser and the air flows nicely all around your hair. I gave this 4 instead of 5 stars because the barrel that fits on your hair dryer has a tendency to get pretty hot. Also, it's not that great of a fit on my babyliss ceramix, but it works as long as I'm holding my head upside down, or the dryer upside down.  It will shoot off if you hold it upright like all other universals have a tendency to do. And it definitely won't stay on if the dryer is on high.
Rating: 4 stars