16-gauge

[ siks-teen-geyj ]
/ ˈsɪks tinˈgeɪdʒ /

adjective

of, relating to, or being a size of shotgun shell having a diameter of 0.662 inches (1.68 cm).
of, relating to, or being a shotgun using such a shell.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019