Apparently, Arya liked the first blanket more than she thought, because that's the only one she could transfigure her scarf into. No matter how hard she tried, she couldn't get the blanket to change size, shape, or color. Forget attempting to transfigure it folded.

She tried once, twice.....three times. No luck. She still got the same cozy wool blanket. Twirling her wand, she glanced around at the other student's blankets, hoping for some inspiration.

"Vestis vellus." Flourishing her wand, she watched as her scarf transfigured itself into the same wool blanket. Frowning at the blanket, she poked it with her wand.

Stupid soft wool blanket.