I have a bad habit of not referring to some of the reference materials that are right at hand. Such was the case with these diminutive fire engines. I had the maker listed as 'Unknown' until I checked out Walt Hiltshew and Trip Riley's 'Pictorial Guide to Plastic Cars & Trucks' (the link to order the guide is on the right sidebar of the blog) and it is listed as Lido. The trucks measure 3 1/8" (7.9cm) L x 1 1/8" (2.9cm) W x 1" (2.5cm) H and you can see a size comparison below with the Ross Tool and Manufacturing Fire Engine which is 4 3/4" (12.1cm) L. Like most of the hard plastic vehicles made during the 1950s, these came in a variety of bright, fun colors and here we see white and yellow. They're nice little additions to the stable of Nifty '50s toy fire engines. Enjoy!