Target Ball

You can't play without the little one!
A.k.a. as "cochonnet" (little pig), "but" (target), "bouchon" (cork), or simply "jack", the lawn bowling term.
They do get lost sometimes, or simply wear out...
Diameter 30 mm ( 1 1/4 in.)
Made from hard boxwood and painted fluorescent red, yellow or green.
In the old days they were always plain natural wood, but now they come in a variety of colors.