Office supplies. Through the Zhifuzi trademark classification query, we can see that stickers belong to trademark category 16 (office supplies). Class 16 trademarks mainly include: paper and cardboard (stickers belong to paper products), printed matter, book binding materials, photos, stationery and office supplies (except furniture) , adhesives for stationery or household use, painting materials and materials for artists, brushes, educational or teaching supplies, plastic paper, plastic film and plastic bags for packaging and packaging, printing type, printing plates, etc. Stickers are adhesive-backed adhesive papers that print various pictures and photos on adhesive-backed papers. They are common stickers on the market and are also a popular fashion product among teenagers and young adults.