Jersey swapping between opponents is all the rage at the World Cup in Japan.
But it's not a one-size-fits-all situation.
Giant Canadian hooker Andrew Quattrin ran into trouble when he tried to pull on the jersey worn by his South African opponent Schalk Brits, after the Pool B game in Kobe City.
They are about the same height but Quattrin weighs in at around 114kg, while Brits is 100kg. And it showed.