This is an elegant board burr which despite its simplicity requires 8 moves to remove the first piece, and unlike the vast majority of board burrs it has a unique solution, with only one of a theoretical ninety-six possible solved states actually assembleable.
Puzzle is 2cm x 2cm x 2.4cm in the solved state
1.974 w x
2.374 d x
0.777 w x
0.935 d x