Optical illusion Zu lang zu breit?? (Too long too wide??)

This is a well made wooden example of a well known optical illusion. The wooden construction allows for the two wooden table tops to be interchanged. The table tops are in fact of an identical shape and size. This looks impossible, but swapping them over proves that the table tops are indeed identical, although your brain finds it impossible to believe this. Purchased from Grand Illusions Ltd in 2010. www.grand-illusions.com.