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Concert grand pianos range in scale from about 7 feet 6 inches to 9 feet 0 inches (229 to 274 cm) or occasionally more. Notable concert grands include: The Steinway Model D, at 8 feet 11 + 3 ⁄ 4 inches (273.7 cm). The Imperial Bösendorfer, at 9 feet 6 inches (290 cm) with 97 keys. The Fazioli F308 at 10 feet 2 inches (310 cm).