Get noticed when you blow into our super loud assorted color Siren Whistles. These 1 3/4" plastic whistles are small and compact but make a super loud noise! Perfect for party favors and for purses and backpacks, too! Assorted colors include red, pink, purple, green, blue, and yellow. Siren Whistles are priced by the dozen. Please order in increments of 1 dozen.