Hi all! I am sure you have heard it all before from others believing that they have a 594 or 596, only to have their beliefs shot down. I always try to believe that I have the most common, cheapest stamp there is and try to go through a process of elimination until I ID the stamp at hand. Through my searches online, using sites like Stamp Smarter or Swedish Tiger, I noticed some stamps are the same except for the design measurements. That leads me to ask questions and I will use the 596 as an example. In the catalogue, it says the measurements are approximate. So if they are just listed as something to go by, what kind of a +/- tolerance is allowed for listed measurements? I have also noticed different measurements are listed for a 596, pending on which site I visit. Stamp Smarter has a 596 at 19x22 1/2. Linn's has it listed at 19 1/4x22 1/2. Swedish Tiger has it listed at 19 1/2x22 1/2. In the cat. it says "measures approximately 19 1/4x22 1/2. Which is right? Now you see why I am confused. Any and all input is appreciated. I thank you in advance.