Piece count cut off
What is the largest count of puzzle for it to be bagged all in one bag? I mean, if you buy 1000 piece puzzle, all pieces come in one bag but if you buy 32000 piece puzzle, pieces will be split into 8 bags of 4000 pcs each. So, is 4000 the cut off or you can get 5000 pcs in one bag, etc?
Thank you