"You don't have to wear it when it gets too hot," Dimitri says, because he feels it's the proper adult thing to do. You know, make sure a child doesn't faint from heat exhaustion because they won't take off a coat. Children can be incredibly stubborn about such things.

He may or may not know this because he and Felix often do the kind of dumb shit they should have stopped doing as children.

"But that's why you can remove the sleeves, if you want." Maybe it will help. Maybe, with all the fur, it won't. Dimitri always wears his armor and cloak when traveling, so he's just succumbed to his fate. "I made it just a little bit larger than normal... I'm hoping that you'll grow into it, and be able to keep it longer."

Chip seems to be right at the age where they may start hitting some intense growth spurts... Best to be prepared. Dimitri recalls some of the newer castle tailors being quite vexed and exasperated when he and Dedue started hitting theirs, while the veterans seem merely resigned to it.