While the base ref shows the few items Taro is generally considered to always be wearing, this one shows the outfit that he wears as part of his glamour... will post that in a moment...

As much as Taro likes to stand out and draw attention, he's still incredibly paranoid and wants to keep certain things under wraps... especially some of his more stand-out features that could more directly identify him to anyone well enough within the know. So Taro usually goes around and was introduced to the party under a Glamour spell/effect, which hides his true appearance and makes him look like a "normal human" to anyone other than himself. It's a more powerful than normal illusion, so it manages to cover for a lot of things, including the fact the human glamour is taller than he actually is...

In particular though, the human form wears a particular set of clothes... and to help maintain the disguise, Taro obtained a matching set of the clothing to have on standby in case he needs it. So while he isn't always wearing these clothes, he at least has them, so he can pull them out when needed or leave them lying about when he's "not wearing them" so as not to stress the limits of the illusion effects. The real clothes ARE fit to his actual size and not his glamoured size however, so anyone actually investigating them might notice the deviation... though he'd probably claim the clothing was magical and adjusted to his size when worn? XD Because he is a liar.