The goal of this puzzled is to fit all 7 wave-shaped 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 see-through orange acrylic and fits into the sturdy white plastic base.  The solution may be more difficult than you would expect.
Please note that acrylic colors may vary slightly. 
The tray measures: 13.6 cm x 10 cm x 0.6 cm / 5.3 in x 3.9 in x 0.25 in

• See at Puzzle Master