Discuss this oxymoron in the comments below.
Never seen a round boxing ring. They be square. A ring can't be square (the outside doesn't count, as in a square wedding ring, because it's still a ring). A square can't be a ring. Passes the test of an oxymoron.
Its like a round box
Definition of Ring:
Surround (someone or something), esp. for protection or containment.
Not an oxymoron.