This is a Small Piece Prism Art Jigsaw Puzzle and pieces are small than a standard jigsaw puzzle.
This jigsaw puzzle is beautifully transparent.
It would be perfect to decorate it by your window side since it lets the lights in like stained glasses.
Gluing is not necessary as they are made of special material.
Finished size is 10 x 14.7cm
Frame for this puzzle is available HERE