What is the enchanted spell Hermione uses for her purse?

Hermione Granger doesn't use an enchanted spell on her purse. She uses a larger-than-life spell on her handbag to make it bigger on the inside.

The spell isn't given a specific name in the books, but it's described as a "larger-than-life" charm. This allows her to fit an incredible amount of stuff inside, including tents, food, and even a full-size trunk!

It's a handy spell for any wizard or witch who needs to carry a lot of stuff.