Genie followed Janice to a shoe shop, remaining invisible. "I'd like a pair of black shoes with silver buckles please." said Janet to the store assistant.
"Certainly Madam." replied the assistant "What size are you?"
"Oh er, size 7." answered Janice.
Then Genie had an idea. "Size 7?" she chuckled under her breath "We'll soon change that!".
She waited until Janice took off her shoes, then she enlarged her feet to a size 9 without either Janice noticing. Then she waited until the assistant returned with the shoes.