PDFWAC 212-75-005
Minimum specifications for approved signs.
To be approved by the state fire marshal, a sign warning of the presence of guard animals as required by RCW 43.44.120 must:
(1) Be at least three inches in height by five inches in length; and
(2) Bear the following caption in bold print at least one-half inch high: "caution! premises protected by guard animals."