"No, why would I?" Caster crossed his arms. "Some fresh flowers are pink. It's not a bad color."

He leaned forward to get a better look at the coat being offered, but finally focusing only on the collar size to make sure it wouldn't slip through his whole shoulders. The texture looked comfortable too.
Finally, Caster nodded and stretched out a hand.
"Can I touch it?"

The coat was received with a firm squeeze from Caster's hand. Oh, the material really was soft! 
Few seconds passed after that realization and then he took the coat from Sunny's hands to grab it with both his own. Caster pressed the fuzzy part against his face, still marvelling at the feel of the synthetic cloth.

Meanwhile, his companion was still inspecting the coat. He's caught up in checking the fake fur part, having pulled out a few bits of the fuzz to see how it held to the cloth.

It took a while but Caster finally left the coat alone. Satisfied with his observations, he held it bundled tight with one arm in a manner very similar to hugging. 
What other things had Sunny chosen? He peeked inside the tent once more.

Well, that looked enough like a complete outfit. At least, Caster could picture how to put the chosen pieces on. So it should be a convincing enough set of clothing...hopefully.

"It looks okay. Interesting too." He nodded to show his approval while raising the coat to make sure it was included in his opinion. "I can put it all on and tie it up with the belt. Except the hat, of course."

"That too," he replied confidently before making a tying gesture around his waist. "It needs to hold up well."
What Caster is picturing in terms of clothing is to layer everything on, then use the belt to secure it all in place. The strategy generally worked for clothes that were too large. But maybe it wouldn't be so good for too many layers? No way to know until he tried.

He stared at Sunny for a few seconds before realizing what that meant. A soft "oh" escaped his lips, and he tilted his head. 
"How is everything going to stay on, then?"

"Jeans..." he whispered, repeating the new word to himself. Thankfully, that didn't seem to distract Caster from paying attention, as he clearly was following the explanation with all his senses and a brief nod to confirm he understood.
"I see. Each layer secures the one under it." Now the shape of the clothes made perfect sense. There was only one thing he wondered. "What about shoes? Do socks now replace them sometimes?"
Caster glanced at Sunny's shoes as he asked that. He could not imagine that a person walking around in the wild with only socks on would feel comfortable. Well, he wouldn't mind, probably. But others might.

A reasonable solution, and besides, people probably wouldn't pay much attention to the shoes. Especially since he was going to have a coat on. It would have been much better if the coat had had a hood though.
"Okay. Don't worry, I won't trip," Caster reassured. 

The thought brought a momentary smile to the boy's face. He decided not to refute the offering.
He nodded in agreement to the other sentences. "I like hats. It's okay."

Caster hm-ed in agreement, but turned his head to follow Sunny's movement until there were several steps of distance between them. Then he entered the tent to inspect the chosen clothing more closely and knelt down next to the pile.
The pink coat was set to a side of the stack and patted down with care. Now, he'd been told the shirt went first, right? He picked it up. It probably would fit snugly on someone bigger than himself. But he did have a preference for looser clothes, so he set it down briefly to get ready to change.
He undid the clasp on his cloak, letting it fall behind him and vanish. The material was light--he didn't feel any major change--but now he had no hood to pull up and cover his face. A second-long sensation of being watched passed quickly and then he paid it no heed. Or, rather, chose to ignore it.
The tunic went off next, and then it was only a matter of getting the shirt on, which he did quickly with a shake of his head to free his hair from the high turtleneck. Perfect. But when Caster reached for the vest, he noticed something. The sleeves covered his hands.
Trying to roll back the sleeves without using his fingers was hard work, so he compensated by biting the edge of the fabric and pulling back until his left hand was freed. Then he repeated the process for the other hand without thinking much about it.

Having conquered the process of putting on the shirt, Caster found it easy to slip on the vest. The lack of long sleeves made the task much easier. 
Now, which one next, the jeans or the socks? The pants were supposed to hold up the socks, though because of the size it would not be a tight fit. Maybe it would be better to just go in the order he'd been told instead of trying to figure it out by himself. He could do that later. So, Caster shifted to shake off his shoes and then roll up the socks until the border was thick enough to not slide down. 
And finally, he stood up for the last of all the "inner" clothing: the jeans. 
That one looked simple too. He didn't take off anything else for the pants were long enough to cover up the entirety of his legs (and feet). It was just a matter of pulling up the pants, up as high as they'd go- and then Caster realized he forgot the belt at one side. As soon as he leaned over to pick it up though, the pants threatened to fall off, and he crouched to avoid that. A slow but sure stretch towards the belt and then, voila!
But looping it around the jeans' waist turned out to be another matter entirely, as when he put the belt through one loop, the pants' waistline dropped on the opposite side and the belt slipped out with it.

Maybe he was trying at it in the wrong way. Caster paused for a moment to regard the fallen pants and the belt in his hand, and an idea sprang in his mind. 
If he couldn't put both on at the same time, it was just a matter of going one by one. First, the belt through the loops, and then, pull up the pants. There, problem solved!
But a new trouble appeared soon after: the belt was much too long to clasp closed. This wouldn't have happened if the clothing were made to size, and yet Caster didn't think much of the lack of belt-holes at first. He could probably bite a new hole so it would fit, or do something similar, but then... maybe Sunny wouldn't like that. 
Ah, well, belts are simply thick strings. Caster pulled it tight into a knot (though the clasp, as he had been told to do!) and twisted the ends of the belt in and out. Now the pants would stay up!