well, its about 4 inches slimmer on the x axis and 2 inches slimmer on the y axis (in normal orientation) than my qpad. And on the odd occasion i can come very close to the bottom of the matt. Would only like maybe one more inch on it or something.
One thing to note, while drunk at lan and just after having heated up a microwave meal, DO NOT place it on the matt. I did for about 15 seconds while i moved my keyboard back so i could put the meal down there, and it warped the matt, and ive never got it back to "flat" since. need to buy another one but all my disposable income has gone on other things.