That is the same size as the other examples of this siren. This, just for reference, is the same type of siren that has been discussed from the Country Lakes, NJ Fire Department (which should be coming down shortly and going into my collection) and the Mount Union, Pa Fire Department (who I have been trying to wrangle a test out of). There is another one in Bolton, Mass (that has not been discussed on here) which appears to be an older version (this is not the best picture). I can't wait until I get home and can watch this video!!!
Taken from Firenews.org