Circlet

The Circlect is a recurring piece of equipment in the Final Fantasy series. It is most often a helmet, and gives a variety of stat boosts, mostly to magic and magic defense.

Final Fantasy V
The Circlet can be bought in the Phantom Village or won from the Gorgimera. It gives +10 Defense, +2 Magic Defense and +3 Magic Power. It can only be equipped by the "lighter" character classes like the Mime and the Geomancer, while "heavier" classes like the Knight and Ninja cannot use it.

Final Fantasy VI
The Circlet is equippable by all characters except Umaro. It can be bought in Jidoor and Thamasa in the World of Ruin. It gives +2 to Strength, +1 to Speed, +3 to Stamina and +4 to Magic Power, as well as 25 Defense and 18 Magic Defense. Although the defensive boost is only mediocre, no other helmet gives such a high combination of stat boosts, making the Circlet extremely useful when paired with strong Armor to offset its low defense.

Final Fantasy VII
The Circlet is an Accessory and can be Stolen from Snow, Ho-chu and Ultimate Weapon. It gives +30 to Spirit and Magic. Although the stat boosts are high, the rarity of Ho-Chu and Snow makes acquiring the item in bulk difficult.

Final Fantasy VIII
The Circlet can be refined using Quezacotl's Card Mod ability to refine 10 Gerogero cards into a single Circlet. It can then be refined into 2 Aura Stones, or used to teach a GF the Magic+10% ability.

Final Fantasy IX
The Circlet gives 51 Magic Defense and costs 20000 gil. It nullifies Earth-elemental damage and teaches the abilities Clear Head and Jelly.

Final Fantasy XII
The Circlet gives +60 Magic Defense, +2 Strength and +10 Magic Power. It needs 100 LP to be used and can be found in Pharos at Ridorana.

Final Fantasy Tactics
The Circlet gives +100 HP and costs 10000 gil to purchase.