Unfortunately scales vary with Dinky Toys. Most were 1/43 but many military models were different, and of course the Dinky Supertoys were larger. Sometimes slight diffrerences were done to better represent the model in question and in the late years of production newer owners of the firm made changes. There are a number of good books available on Dinky Toys. The best is Mike and Sue Richardson's "Great Book of Dinky Toys" but it is very expensive. For an overall view check out any of the editions of Edwin Force's books. The latest edition is number 7 and easily found on Amazon. He also has published books on Corgi, etc. and you may find these helpful. Good luck and happy collecting!