1Stickers that are difficult to use in daily conversation, such as objects and scenery.
2Stickers that are not illustrated pictures, such as photos.
3Stickers that have poor visibility, such as pictures that are too long or full-length illustrations of tall characters.
4Sets that significantly lack variety, such as stickers made up purely of pale colors or strings of numbers.
5Stickers that offend public order and morality, are suggestive of under-age drinking or smoking, contain sexual or violent imagery, or may fuel nationalism.