Mandalor_Ian 2 I bought the 120 x 50 size as this is the exact size of my desk. However, the mat was actually 122 x 52. Yep, 2 centimeters bigger, both horizontally and vertically. Rather than send it back, I cut the mat to size. It's pretty tough (2mm), so I needed an industrial size cutting knife. It wasn't easy. When paying that much for a piece of clear PVC plastic, I was expecting it to be the right size at least.Another issue is that I don't think it's perfectly shaped. For example, when I line up the horizontal side, the vertical sides are slightly off. It's possible that this is the desk, not the mat. However, the desk was pretty expensive, so I'd be surprised.The PVC itself is perfectly clear, strong, and heavy. This is good. Neither size has an anti-slip texture, so if you won't have heavy objects to hold it down, this could be an issue.Overall, it's a quality sheet of PVC that suffers from being the wrong size (and possibly misshaped).