Designed by Wladimir Krasnouchow, distributed by Puzzle Master 2019; cardboard sleeve added by J. A. Storer.
(plastic, 4+3/16 x 3+11/16 x 1/4, the circle is .57 inches diameter)

In a theme like the classic Double Square puzzle, this clever puzzle presents the seemingly impossible task to pack the red circle inside the frame together with the five pieces. That is, somehow you have to get the red circle to fit into this already crowded tray:



One having seen the solution, is unlikely to forget it. If you are frustrated, here is a hint (shown upside down so it won't read it by mistake):