Image imported from derpibooru 
Original Description:
 
the fairy godmother pointed her wand, and a small sparkle of magic flew out of the end, touching Scootarella’s clothes. The girl looked around her in amazement as energy began to flow all around her.
 
Her sleeves shrank back, until her arms was fully visible, and her collar shrank back until it sat around the top of her chest, running around the sides of her shoulders.
 
Her waist contracted slightly, as the bodice began to shift, the tears and holes in her clothes stitching themselves together and forming into rich, soft fabric. Her skirt began to grow longer, until it reached the ground and she could no longer see her feet, and then began to expand in diameter, growing wider and wider until it took up a full four feet in diameter.
 
Multiple extra layers formed under the skirt giving it extra volume, and the entire dress turned a beautiful Light purple firefly ball-gown, to match almost similar, but much larger dress like her mother was wearing.
 
 
The Fairy Godmother: Well? What do you think
 
 
Scootarella: Thank you so much!
 
 
Cinderella leaned in to speak to her daughter.
 
 
Cinderella: Remember it wears off at midnight, so make the most of it.
 
The Fairy Godmother: Actually, I made the spell permanent. It will never wear off, so it will stay that way forever. I also used some magic to lighten the skirt a little, to make it easier to move about in.
 
 
the Fairy Godmother smiled.
 
 
Cinderella: I’d always wondered how that worked
 
After Cinderella said it, She taking her daughter hand.