How big does a urinary stone need to be to require someone to break it with a 0.8 cm?

Patient's question:

How big does a urinary stone need to be to require someone to break it with a 0.8 cm stone? Patient gender: Male Patient age: 40

Doctor's answer:

Hello. Where is the specific location of the stone? If the stone is larger than 1 cm, it is recommended to undergo lithotripsy. It is suggested to start with conservative treatment first.