There are two ways to make sweaters smaller: ironing and drying. Soak in high-temperature water for 30-60 minutes, then dry and set with an electric iron. Knitwear is a process product in which yarns of various raw materials and varieties are formed into loops through knitting needles and then connected into knitted fabrics through a series of sleeves.

Knitted products can be used not only for clothing and decoration, but also for industry and agriculture, medical care and national defense. Knitting is divided into hand knitting and machine knitting. According to different technological characteristics, knitting production can be divided into weft knitting and warp knitting. In weft knitting production, raw materials can be produced directly on the machine after winding.