织毛衣用毛衣针,织毛衣针的针号对应着毛衣针的粗细,毛衣针的针号越大,毛衣针越细。4号≈6mm,5号≈5.5mm,6号≈5mm,7号≈4.75mm,8号≈4.5mm,9号≈4mm,10号≈3.5mm,11号≈3mm,12号≈2.5mm,