The goal of this puzzled is to fit all 9 pieces into the tray provided.  As with other of Yuu's puzzles, this quality plexi packing looks better than the picture can depict.  Each piece is made from white acrylic and fits into the sturdy blue plastic base.  Considered to be the most difficult of Yuu's packing puzzle designs, the solution may be more demanding than you would expect.
The tray measures: 13.6 cm x 9.6 cm x 0.6 cm / 5.4 in x 3.8 in x 0.25 in

• See at Puzzle Master