Ever heard of a school uniform exchange?
When you grow out of your school uniform and need a new one, it can be pretty expensive for whoever's paying the bill.
But what about if you could just swap the clothes that don't fit anymore, for some that do?
That's what lots of kids across the country have been doing, with the help of uniform exchanges and swap shops.
Ricky's been finding out how it not only saves money, but cuts down on waste as well.