A systematic study classifying medieval heraldic shield shapes primarily in England, tracing forms from the eleventh to fifteenth centuries and then following later nomenclature to record earliest and latest examples. The author compiles evidence from seals, manuscript illuminations, stone carvings, and legal and poetic sources to date shapes, describe construction (materials, bosses, rims), and discuss associated heraldic devices such as mantlings, torces, wreaths, and palm branches. The work provides references for each statement and concludes with a concise index aimed at enabling more precise dating of undated artifacts and illustrations.