Candy store pack.
includes 33 packs plus one sample sticker.
pack size 7 x 14 cm . sticker size 3 x 5 cm
These were sold at candy shops. Kids could buy one envelope at a time or the whole pack. There are 3 special cards or lucky cards. Get one of the lucky cards and get 20 yen off. I don’ t think the lucky cards are still valid 😉