MS WGO 20 Sets Custom White Fabric & Cardboard A4 Jigsaw Puzzles, 2400 Pieces, 20 Puzzles per Set, 3+ Years, Intermediate Skill Level

Are these supposed to be glittery? I just got them and they are white with silver glitter

In the photos the shapes of the puzzle pieces don't seem to vary. Is there variation that would prevent incorrect pieces from fitting together?

What is the exact width of these puzzles? Do they exceed 8.5"?

So how many puzzles does an order make. One puzzle or twenty?