Z Scale: 3.9 inches long by 3.5 inches tall. (first level door is slighly bigger than Z scale but balcony door and other third floor door match Z scale height. From floor to ceiling height is about 9ft in Z scale)

N Scale:  4.5 inches long by 4 inches tall.

HO Scale: 8.1 inches long by 7.1 inches tall.

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