The first question you have to answer is are they accurate?
They come with a clearly legible finish, thick plastic (although still flexible), and do precisely what you need them to do...allow scenery builders to go between 1:1 and 1:65 (in this case) measurements. I can see these rulers having a prominent role in my shop and feel that they were an excellent value. The highest praise I can give any vendor/manufacturer is this...I am going to order additional product from them.
Rulers of the World has more than 200 scales at present and if by chance you need a scale that they don't have, they will make it for you. With a minimum order of five rulers though.