Since I started improving my polymer clay work by following tutorials and going to workshops I have found it very confusing when people give you a pasta machine thickness as the different brands (particularly Atlas and Imperia the main 2 quality machines) don't compare easily. I have an Imperia machine which I love, it is easy to take apart to clean, only requiring to remove the end plate on one end (the one without the knob) with 1 screw and then I can push out the rods by hand and clean the scraper plates. I recently acquired a cheap Kitchen Craft pasta machine which looks like an Atlas but it doesn't run smoothly and the clay always wrinkles up on settings 8 and 9 - I would pay the extra and get a quality machine if you can.
I spent a lovely day in London yesterday with the
London Polymer Clay Group (it was a blissful 2 hours on the train from me which I thoroughly enjoyed and I managed to squeeze a flying visit in to the jewellery gallery at the V&;A museum too!). I had already made thickness chips for the 2 machines I have and Nina kindly allowed me to make a set on her Atlas so now I have all 3! Here's the measurements
This is what my chips look like
They will probably be a bit different from machine to machine and possibly even from different sides of a sheet depending on how straight the rollers are but hopefully it's a useful starting point.
So if you want to compare I would say as long as you remember a 1 on an Imperia is about the same as a 2 on an Atlas, 3,4 and 5 are much the same and the thinnest on an Imperia is like a 7 on an Atlas.(Toni the table won't be visual enough for you - your machine is very close to the atlas measurements)