The recommended size for a commercial lobby depends on various factors like the purpose of the building, the number of occupants it hosts, and the building's architectural design. However, a standard size for commercial lobbies is around 10-15% of the total floor area of the building. For example, a 100,000 square foot office building might have a lobby of approximately 10,000-15,000 square feet. Additionally, the lobby should be designed in a way that accommodates the building's occupants comfortably, allows for efficient traffic flow, and creates a welcoming atmosphere.
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