Read from the World of Warcraft client build files.
How Nightstalker's Boots Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Nightstalker's Boots 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 Nightstalker's Boots (item level 13) in item level among Armor > Leather, Feet slot, from item level 11 to 19.
Blizzard numbers items as they are created, so the named items next to ID 240325 (240320 to 240330) were usually added in the same batch as Nightstalker's Boots: the same quest line, zone, vendor or reward set.