Read from the World of Warcraft client build files.
How Nine-Tailed Helmet Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Nine-Tailed Helmet suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Transmog Sets
Nine-Tailed Helmet is part of the transmog set Nine-Tail Battlegear (Rogue only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Nine-Tailed Helmet Fits
Other Items Named Nine-Tailed Helmet
4 other items in the current build are also called Nine-Tailed Helmet. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 95937 (95932 to 95942) were usually added in the same batch as Nine-Tailed Helmet: the same quest line, zone, vendor or reward set.