stone's throw

noun1

1. •
   A short distance, roughly equivalent to how far a person can throw a stone.

   • A couple of grown-ups was standing a couple of stone's throws away from us.
   • 1 March 2018, Tusdiq Din on BBC Sport, Mohamed Salah: Is Liverpool striker's success improving engagement with Muslim fans? A stone's throw from The Hawthorns is Oldbury, home to Baggies fan Ashley Rawlins.