These are the puzzle piece trays we produce on our CNC in our wood working shop. They are about 7.75" W x 6" L and slightly less than an 1" thick. The tray is .5" deep. They are cut from Walnut. Buy 1 for a puzzle fan or buy multiples to connect the pieces.
Buy 3 get the 4th free!!
 
Actual product could look slightly different but same wood and same size.