Here is a comparison of the 3 available sizes.

• The new 48 x 24 size is VERY BIG. IT'S HUGE.
  Only buy it if you are 100% sure it will fit your table.

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• The 36 x 18 size is perfect for any medium sized table.
  Here above you can have your keyboard, mouse and headphones without
  no problem

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• Finally, there are the 18 x 16 size, the perfect size to keep just your mouse on top. But don't let its size fool you; you can have your whole arm up while you play and never feel like you're short on space!