A small, narrow stone blade, ranging from less than 5-11 millimeters wide and about 15-45 mm long. They were often made from a conical or wedge-shaped microcore, often punch-struck or pressure-flaked. Microblades were often retouched into various forms of microliths. Microblades are found in the Upper Palaeolithic industries of Eurasia and in the Upper Palaeolithic of Siberia, but are also characteristic of the Mesolithic and later industries of the circumpolar regions. Examples are the Eastern Gravettian, Dyuktai culture, and the Arctic Small Tool Tradition.