Rules: Dragons and Magic Items

Being both very smart and very wealthy, dragons often employ magic items.
A younger dragon without any spellcasting ability—even if it has one or more spell-like abilities—cannot use spell completion items or spell trigger items. An older dragon casts spells as a sorcerer and is an arcane spellcaster; it cannot cast a divine spell from a scroll unless it has levels in a divine spellcasting class.
Because a dragon can cast spells as a sorcerer, it can use any spell trigger item that produc es the effect of a sorcerer/wizard spell. If the dragon also can cast cleric spells as arcane spells, it can use any spell trigger item that produc es the effect of a spell from the cleric spell list or a spell from a domain to which the dragon has access.
A dragon usually lacks weapon proficiencies and fully prehensile appendages, so it cannot employ weapons. If a dragon assumes a form with prehensile appendages, it can wield weapons while in that form, but it remains nonproficient unless it has lvels in a class or a feat that makes it proficient (as noted earlier, a dragon with the alternate form racial ability is proficient with all simple weapons).
Any dragon is capable of using potions. In most circumstances, a dragon doesn’t even bother opening a potion container; it simply swallows it or chews it up. Because a dragon can eat just about anything, this doesn’t cause any problems for the dragon, nor does it change the effect of the potion in any way.
Because magic items that must be worn will fit users of any size, a dragon can use any magic item a humanoid character can.
A dragon can use a headband, hat, or helmet normally. In some cases, an item of this kind can be specially made for a dragon in the form of a crown, diadem, or skullcap. For example, a dragon’s helm of telepathy may be in the form of a skullcap of telepathy.
Goggles and lenses made for dragons usually come in the form of cusps that fit over the dragon’s eyes, or lenses the dragon places directly on its eyes, much like modern contact lenses. A humanoid character can use any special dragon item of this kind without difficulty.
A dragon can wear a cloak, cape, or mantle on its back, usually between the wings. Items of this sort can come in the form of a frill stud or spine cap instead. A humanoid character can use a frill stud or spine cap by affixing it to a cloak, cape, or mantle.
A dragon wears amulets, brooches, medallions, necklaces, and periapts around its neck, just as a humanoid does.
A dragon is not proficient with any kind of armor and usually does not bother wearing armor. In any case, armor crafted for a humanoid does not fit a dragon’s body. Armor created for a dragon resembles barding and will not fit a humanoid, but will fit a quadruped of the same size as the dragon.
A dragon can wear a robe over its shoulders and upper chest. In some cases, a item of this kind can be specially made for a dragon in the form of a collar or epaulette. A humanoid can wear such an item without difficulty.
A dragon can wear a vest, vestment, or shirt draped around its wings and lower chest. In some cases, a item of this kind can be specially made for a dragon in the form of a pectoral stud or a belly stud. A humanoid can wear a magical dragon pectoral stud as though it were a vest. It can wear a belly stud in its navel.
A dragon can fit bracers or bracelets over its lower forelimbs.
A dragon can wear gloves or gauntlets on its forefeet. Specially made dragon gauntlets usually have no fingers, just holes for the dragon’s claws. A humanoid can wear magical dragon gauntlets without difficulty.
A dragon can wear rings on its front claws.
A dragon can wear a belt around its midsection. Sometimes, items of this kind take the form of bands the dragon wears on its hips. A humanoid can wear such items without difficulty.
A dragon can wear boots on its hind feet. Specially made dragon boots usually resemble a dragon’s gauntlets, but are shaped for the hind foot. These magic items also fit humanoid feet.
None of these items interferes with a dragon’s movement, including flight.