Read from the World of Warcraft client build files.
How Nighthide Hat Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Nighthide Hat suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Similar Items
The 10 items nearest to Nighthide Hat (item level 13) in item level among Armor > Leather, Head slot, from item level 19 to 21.
Blizzard numbers items as they are created, so the named items next to ID 240439 (240433 to 240444) were usually added in the same batch as Nighthide Hat: the same quest line, zone, vendor or reward set.