Lexie and Her Shrinking Clothes!

What about Lexie, a high school girl with a pretty face and long brown hair who trusted her friend, an amateur in magic, to make any clothes look good on her?

She's suffering from a shrinking clothes spell now, and anything she wears starts to shrink until it either tears apart on her body or she takes it off and lets it shrink into nothing. Even worse, there's an accelerating effect where new clothes put on too fast will shrink even more quickly!

How does it all happen?