In sewing and haberdashery, notions are small objects or accessories, including items that are sewn or otherwise attached to a finished article, such as buttons, snaps, and collar stays. Notions also include the small tools used in sewing, such as needles, thread, pins, marking pens, elastic, and seam rippers. The noun is almost always used in the plural. The term is chiefly in American English. It was also formerly used in the phrase "Yankee notions", meaning American products. A fabric store will have a section or department devoted to notions, and a spool of thread is considered a notion.

Sewing is the craft of fastening or attaching objects using stitches made with a sewing needle and thread. Sewing is one of the oldest of the textile arts, arising in the Paleolithic era. Before the invention of spinning yarn or weaving fabric, archaeologists believe Stone Age people across Europe and Asia sewed fur and leather clothing using bone, antler or ivory sewing-needles and "thread" made of various animal body parts including sinew, catgut, and veins.