Precision gradient triangle rulers, a set of two (small and large), are now for sale. I've cleaned them as much as possible, but there are some stains like black marks that couldn't be removed. I don't think it will affect their use, but please refrain from purchasing if you are overly concerned about this. They will be shipped in their original box. Sizes: Small (closed): 8.5cm x 21cm (maximum 26cm when open) Large (closed): 27cm x 31cm (maximum 38.5cm when open)