stone's throw, a
A very short distance, as in They live just a stone's throw from us. This metaphoric term alludes to how far one can toss a stone. [Second half of 1500s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.