ribbon -
any long object resembling a thin line; "a mere ribbon of land"; "the lighted ribbon of traffic"; "from the air the road was a grey thread"; "a thread of smoke climbed upward"
oak leaf cluster a United States military decoration consisting of bronze or silver oak leaves and acorns awarded to anyone who has won a given medal before
A ribbon or riband is a thin band of flexible material, typically cloth but also plastic or sometimes metal, used primarily for binding and tying. Cloth ribbons, most commonly silk, are often used in connection with clothing, but are also applied for innumerable useful, ornamental and symbolic purposes. Cultures around the world use this device in their hair, around the body, or even as ornamentation on animals, buildings, and other areas.