A Paladin set refers to a collection of equipment with a Paladin class restriction that provides an additional bonus when worn together. Patch 2.4 changed the stats on gear intended for Retribution Paladins, specifically the Arena Season 1 and 2 sets and the Tier 4 through Tier 6 raiding sets. The spell damage on all the sets was replaced with Strength and (to a lesser extent) Critical Strike rating.
Dungeon Sets
Paladin Dungeon Sets
Tier Sets
Paladin Tier Sets
Tier 1 , Lawbringer Armor
Tier 2 , Judgement Armor
Tier 3 , Redemption Armor
Tier 4 , Justicar Armor , Battlegear , and Raiment
Tier 5 , Crystalforge Armor , Battlegear , and Raiment
Tier 6 , Lightbringer Armor , Battlegear , and Raiment
Tier 7 (10-man), Heroes' Redemption Plate , Battlegear , Regalia
Tier 7 (25-man), Valorous Redemption Plate , Battlegear , Regalia
Faction Sets
Paladin Faction Sets
PvP Sets
Paladin PvP Sets
Paladin Arena Sets
Alliance
Horde
Alliance and Horde Arena Reward
Arena Reward Season 1 , Gladiator's Aegis , Gladiator's Redemption , Gladiator's Vindication
Arena Reward Season 2 , Merciless Gladiator's Aegis , Merciless Gladiator's Redemption , Merciless Gladiator's Vindication
Arena Reward Season 3 , Vengeful Gladiator's Aegis , Vengeful Gladiator's Redemption , Vengeful Gladiator's Vindication
Arena Reward Season 4 , Brutal Gladiator's Aegis , Brutal Gladiator's Redemption , Brutal Gladiator's Vindication
Paladin set lookalikes
Paladin Un-Sets
These 'sets' do not have a proper name and offer no set bonuses. They do however present a unified look and carry paladin-friendly stats.
Generic Plate Armor Sets
Pre-40 Mail Armor Sets
Paladin sets
Dungeon sets Raid sets Faction sets PvP sets
Dungeon sets Raid sets Faction sets PvP sets
Raid sets
Tier 22: Luminous Chevalier's Gallantry
Raid sets
Tier 23: Virtuous Silver Cataphract